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Author Subject: building a 2.1 - what do you need?
Mossy1985

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Location: Darlington

Registered: 04 Nov 2014

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Post #1
I've been reading a few different posts on this and there only seems to be snippets of info here and there no real.definative list of what is required to accomplish this. So for you experienced folks do you think you provide me with a list of parts required and if possible the model of where I can find said parts

Cheers

Dave

Ps what cam.options do.you have with a 2.1? Same as a normal rs?
Posted 18th Jan 2015 at 09:23
rallyeash

Seasoned Pro

Location: Devizes

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Post #2
TD steel crank. 88mm
S16 pistons and Rods. 86mm
Machined pistons if you want to run bigger cams.
2044cc.

Fairly easy and cheap build as it's all off the shelf stuff.

I've got.

TD steel crank 88mm
Machined block
Forge Pistons 87mm and custom short rods.
Cat Cam 109's
Maniflow works manifold
Jenvey 50mm
Dry Sump

2088cc.
Not a cheap build. My pistons and rods were £1200 alone.

You can use a 2.1 TD steel crank and build a 92mm x 86/87/88mm engine but I'm not sure on the piston rod combo. Even mine wernt off the shelf and made to spec.

________________________________________

230 hp 2.1 16v XU 205 rallye on jenveysHyper Project thread here
309 3dr K20 Type R
Posted 18th Jan 2015 at 10:23
Mossy1985

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Post #3
Couldn't of asked for a better reply Thumbs up thanks alot

Posted 18th Jan 2015 at 10:57
hediis

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Location: Höganäs, Sweden

Registered: 07 Feb 2010

Posts: 54

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Post #4
I've bought 164mm rods for my TD 92mm build but my piston have a compression height of only 27.5mm. But that's pretty much for a race engine.

I can get another set of rods and pistons made for 92 mm crank if someone want, the pistons are custom after your specifications.

________________________________________

Peugeot 306 GTi-6 -97 (Ph1, blaze) Low n slow
Peugeot 306 GTi-6 -97 (Ph1, blaze) Trackday car, 226hp N/A (Engine rebuild right now)
Peugeot 306 GTi-6 -00 (Ph3, black) Low n slow
Posted 19th Jan 2015 at 21:51
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,817

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Post #5
what kind of price are you talking? what manufacturer also? you may have a buyer for two sets if they're good...

can the pistons have longer skirts to be more of a road piston than a race type? heavier yes but longer lasting.

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 19th Jan 2015 at 21:59
hediis

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Post #6
welshpug! wrote:
what kind of price are you talking? what manufacturer also? you may have a buyer for two sets if they're good...

can the pistons have longer skirts to be more of a road piston than a race type? heavier yes but longer lasting.


I don't know about the skirts but i think it's possible.

The stuff i bought are from http://xrallyparts.com and because its all custom it wasn't cheap. But i couldn't find anything that fit my spec with 88mm bore and 14:1 compression ratio so it ended up like this. I think it costs something around £1700-1800? Sylvain is very helpful

164mm rods (made for xud crank), 18mm pin, trimetal conrod bearings, 88mm pistons with 24.5mm compresson height (thought it was 27.5) and 5cc dome.

I'm going to deck the block 0.3mm and port the head and modify it to fit my 88mm pistons. This with a 0.7mm head gasket will get me to around 14:1 compression ratio. 2238cc Smile

________________________________________

Peugeot 306 GTi-6 -97 (Ph1, blaze) Low n slow
Peugeot 306 GTi-6 -97 (Ph1, blaze) Trackday car, 226hp N/A (Engine rebuild right now)
Peugeot 306 GTi-6 -00 (Ph3, black) Low n slow
Posted 20th Jan 2015 at 07:12
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,817

Status: Offline

Post #7
14-1?!

e85?

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 20th Jan 2015 at 07:26
hediis

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Post #8
Oh yes, e85

________________________________________

Peugeot 306 GTi-6 -97 (Ph1, blaze) Low n slow
Peugeot 306 GTi-6 -97 (Ph1, blaze) Trackday car, 226hp N/A (Engine rebuild right now)
Peugeot 306 GTi-6 -00 (Ph3, black) Low n slow
Posted 20th Jan 2015 at 07:39
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,817

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Post #9
cool, 88mm is very risky though.

I can get pistons and rods for around 14-1500, would be CP and farndon or carillo.



Dave, the cams you can use coild be much wilder if the pistons are designed properly, however you need to take into account the limitations of the standard valve springs and hydraulic tappets, I don't recall the exact peak lift but its around 10.5mm, peter Taylor may have it on his website.

tappets depend on how severe the ramp angles of the profile is and the rpm, however with more cc and good component package choice these engines wont need silly revs to make power, and will have much broader torque.

meaning less fuel, less wear and tear, also ultimately a faster car, less stress on clutches for example (ive seen more and more reports of stress fractured pressed steel pressure plates on high rpm race engines)

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 20th Jan 2015 at 08:59
hediis

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Location: Höganäs, Sweden

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Post #10
welshpug! wrote:
cool, 88mm is very risky though.

I can get pistons and rods for around 14-1500, would be CP and farndon or carillo.


I was in contact with Wiseco and JE-pistons and they coudn't help me if I didn't send them my head because they didn't have any specification about the head. No combustion volume, angles on the valves and so on. I didn't go with CP because some ppl here have problem with the piston rings that they will break

The rods are made with the same width as the xud-rods at the bottom end. They will only fit xud cranks Razz

I have carrillo rods right now and they will be saved for later. Maybe a 500+hp build?

________________________________________

Peugeot 306 GTi-6 -97 (Ph1, blaze) Low n slow
Peugeot 306 GTi-6 -97 (Ph1, blaze) Trackday car, 226hp N/A (Engine rebuild right now)
Peugeot 306 GTi-6 -00 (Ph3, black) Low n slow
Posted 20th Jan 2015 at 09:36
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,817

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Post #11
sandy hasnt had any problems with cp rings afaik, nobody else on here use them??

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 20th Jan 2015 at 09:54
hediis

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Registered: 07 Feb 2010

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Post #12
welshpug! wrote:
sandy hasnt had any problems with cp rings afaik, nobody else on here use them??


by here i mean in sweden ^^ sorry Razz

________________________________________

Peugeot 306 GTi-6 -97 (Ph1, blaze) Low n slow
Peugeot 306 GTi-6 -97 (Ph1, blaze) Trackday car, 226hp N/A (Engine rebuild right now)
Peugeot 306 GTi-6 -00 (Ph3, black) Low n slow
Posted 20th Jan 2015 at 10:01
rallyeash

Seasoned Pro

Location: Devizes

Registered: 11 Dec 2006

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Post #13
My 2088cc engine *only* revs to 7800.

The way the engines build on circuit I'll always be in the gear above than my mates 205 which is a cammed 2.0 gti6 205 on bodies. The mid range torque that my engine produces makes it much faster to be exiting a corner at 5,000 and getting the drive rather than being down a gear screaming it at 7,700.

________________________________________

230 hp 2.1 16v XU 205 rallye on jenveysHyper Project thread here
309 3dr K20 Type R
Posted 20th Jan 2015 at 10:18
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,817

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Post #14
hediis wrote:
welshpug! wrote:
sandy hasnt had any problems with cp rings afaik, nobody else on here use them??


by here i mean in sweden ^^ sorry Razz


haha, as I said, afaik no issues heard from Sandy and he uses them in his full race engines, maybe they have different types of ring.


CP do have drawings, but probably specific to Sandy's design Wink

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 20th Jan 2015 at 10:55
hediis

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Location: Höganäs, Sweden

Registered: 07 Feb 2010

Posts: 54

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Post #15
welshpug! wrote:
hediis wrote:
welshpug! wrote:
sandy hasnt had any problems with cp rings afaik, nobody else on here use them??


by here i mean in sweden ^^ sorry Razz


haha, as I said, afaik no issues heard from Sandy and he uses them in his full race engines, maybe they have different types of ring.


CP do have drawings, but probably specific to Sandy's design Wink


And probably sandy has locked the drawings too.. But it doesn't matter anymore Smile
Its not specific peugeot but other ppl who drive other brands. And right now im trying something that no one i know have tried before. This could be as bad or worse, or better. I'll find out Razz

280-300 hp (flywheel) on e85 sounds about right Razz

________________________________________

Peugeot 306 GTi-6 -97 (Ph1, blaze) Low n slow
Peugeot 306 GTi-6 -97 (Ph1, blaze) Trackday car, 226hp N/A (Engine rebuild right now)
Peugeot 306 GTi-6 -00 (Ph3, black) Low n slow
Posted 20th Jan 2015 at 14:01
hediis

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Location: Höganäs, Sweden

Registered: 07 Feb 2010

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Post #16
rallyeash wrote:
My 2088cc engine *only* revs to 7800.

The way the engines build on circuit I'll always be in the gear above than my mates 205 which is a cammed 2.0 gti6 205 on bodies. The mid range torque that my engine produces makes it much faster to be exiting a corner at 5,000 and getting the drive rather than being down a gear screaming it at 7,700.



I don't fully agree with you. Horsepower is only torque over time.

What if you compare your power at 5000 and your buddys power at 7000? Its about the same?
The easiest way is to use a accelration meter and see where you have the the greatest accelration.

________________________________________

Peugeot 306 GTi-6 -97 (Ph1, blaze) Low n slow
Peugeot 306 GTi-6 -97 (Ph1, blaze) Trackday car, 226hp N/A (Engine rebuild right now)
Peugeot 306 GTi-6 -00 (Ph3, black) Low n slow
Posted 20th Jan 2015 at 14:53
Mossy1985

Senior User

Location: Darlington

Registered: 04 Nov 2014

Posts: 545

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Post #17
Once again I'm lost lol e85?? What is this? When you talk about 88mm crank what part are you referring to? With regards to shells do you use standard pug items? If so do I need mains for a TD and then big ends for a RFY? A standard headgasket? Or is an uprated one advised? I can build an engine when I have the parts lol its just making sure I have the right parts Smile do I need to do anything to the block? Sorry for all the questions but I'm still learning with the 306

Dave
Posted 20th Jan 2015 at 15:08
buzzbrightyear

Seasoned Pro

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Post #18
E85 is a ethanol blend of fuel

________________________________________

andrew315rawson@live.co.uk
Moonstone phase 7 gti6
My Project thread: http://www.306gti6.com/forum/showthread.php?id=119992&page=1
Posted 20th Jan 2015 at 15:21
rallyeash

Seasoned Pro

Location: Devizes

Registered: 11 Dec 2006

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Post #19
hediis wrote:
rallyeash wrote:
My 2088cc engine *only* revs to 7800.

The way the engines build on circuit I'll always be in the gear above than my mates 205 which is a cammed 2.0 gti6 205 on bodies. The mid range torque that my engine produces makes it much faster to be exiting a corner at 5,000 and getting the drive rather than being down a gear screaming it at 7,700.



I don't fully agree with you. Horsepower is only torque over time.

What if you compare your power at 5000 and your buddys power at 7000? Its about the same?
The easiest way is to use a accelration meter and see where you have the the greatest accelration.



Nope.

On circuit I'd say 80% of overtaking is at the start of the straight after a corner. Utilising the healthy extra bit of torque Smile

________________________________________

230 hp 2.1 16v XU 205 rallye on jenveysHyper Project thread here
309 3dr K20 Type R
Posted 20th Jan 2015 at 15:38
rallyeash

Seasoned Pro

Location: Devizes

Registered: 11 Dec 2006

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Post #20
http://m.youtube.com/watch?v=qoWNZiDdQc4

Watch this. 'Busa bike engined kit car v my 205 at Mallory Park.

Look where the extra torque is out of the bends. His HP per ton is much greater than mine.

________________________________________

230 hp 2.1 16v XU 205 rallye on jenveysHyper Project thread here
309 3dr K20 Type R
Posted 20th Jan 2015 at 15:41
hediis

Junior User

Location: Höganäs, Sweden

Registered: 07 Feb 2010

Posts: 54

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Post #21
The easy way to explain it is;
Power;
hp = w = J/s (the constants doesnt matter right now)

Torque;
Lb/ft = Nm = J

In the end horsepower is torque over time with some constant or factor.

More revs = more "Pushes" over the same amount of time. And if we make it very simple and u have a flat torque curve you want to rev as high as possible to accelerate as fast as u can.

In the regular equation that you can convert torque to power you need the revolution because that's your time-factor

________________________________________

Peugeot 306 GTi-6 -97 (Ph1, blaze) Low n slow
Peugeot 306 GTi-6 -97 (Ph1, blaze) Trackday car, 226hp N/A (Engine rebuild right now)
Peugeot 306 GTi-6 -00 (Ph3, black) Low n slow
Posted 20th Jan 2015 at 16:14
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,817

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Post #22
try telling Sandy brown that, he builds less revvy more punchy engines, they have more championships than his competitors who build screamers, with less failures and less fuel used...

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 20th Jan 2015 at 16:24
hediis

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Post #23
Yeah, That's some other things. With higher revs and fuel you have to think about a lot of other things and that's not what I'm talking about. It's always about compromises.

What I wrote in my last post is just the simplest math and physics behind torque and power. You can't have one thing without another. That can we agree on.

When you drive your car you don't change gear right after peak torque.
With higher peak torque you have a higher amount of power at that rev if you compare with some other engine that have a lower torque. But that's not just fair.

If you have two engines with the same amount of horsepower but one have higher torque I would take the one with higher torque because it will have a flatter power curve

Edit; I'm not going to argue about sandys engines, he have found the perfect compromise it looks like. I haven't seen anything from sandy jet either

Edit2; and why did 306 maxi rev to 9800?

________________________________________

Peugeot 306 GTi-6 -97 (Ph1, blaze) Low n slow
Peugeot 306 GTi-6 -97 (Ph1, blaze) Trackday car, 226hp N/A (Engine rebuild right now)
Peugeot 306 GTi-6 -00 (Ph3, black) Low n slow
Posted 20th Jan 2015 at 16:57
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,817

Status: Offline

Post #24
because 309 bhp...

also, rules.

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 20th Jan 2015 at 17:02
adam b

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Location: The Nam

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Post #25
Our engine builder told me not to go beyond 7100 rpm on hydraulic tappets as they float too much

________________________________________

Nothing to see here
Posted 20th Jan 2015 at 18:09

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