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 Posted: Tue Aug 16, 2011 4:45 pm |
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Joined: Feb 08, 2010
Posts: 10151
Trade Rating: +12
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provided you got 183 HP and 167 ft/lb before the headwork and piston.
i take you will have around 20% gain;
so about 220bhp and 200 ft/lb torque.
standard longman gti hit 190 bhp and 170 ft/lb with standard valve and 40mm ITB; with larger valves and higher compression surely can pass 200 very easy.
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Posted: Wed Aug 17, 2011 9:12 am |
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Joined: Feb 08, 2010
Posts: 901
Trade Rating: +1
Location: Istanbul / Turkey
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Put methanol injection on your car if you worry about knock with higher compression ratio. But if it is really a race car why you are worrying about engine. We are running 14.5:1 CR on 206 GTI (again 14.5) and it is daily use car. After 1 year we didnt have any problem with them. Even knock. Just a good tuner will listen special knock kit when mapping. And higher CR will give you more low end torque. Not loss. It is everything about tuning.
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| 2005 206 RC RED
Bilstein B14 Coilover / Brembo 4 Pot Front 330x28 - Rear 325x8 / Quaife ATB Limited Slip Diff / Janspeed Catback
Lot's of CNC machined customs pars.  | |
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Posted: Wed Aug 17, 2011 9:59 am |
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Joined: Feb 08, 2010
Posts: 10151
Trade Rating: +12
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| Schumi wrote: |
| Put methanol injection on your car if you worry about knock with higher compression ratio. But if it is really a race car why you are worrying about engine. We are running 14.5:1 CR on 206 GTI (again 14.5) and it is daily use car. After 1 year we didnt have any problem with them. Even knock. Just a good tuner will listen special knock kit when mapping. And higher CR will give you more low end torque. Not loss. It is everything about tuning. |
that's illegal in UK i believe
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Posted: Wed Aug 17, 2011 11:50 am |
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Joined: Feb 07, 2010
Posts: 3085
Trade Rating: +12
Location: Essex
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nice idea Schumi... but we have to provide a fuel sample which must only contain "pump" fuel...... but I like your thinking 
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Posted: Wed Aug 17, 2011 12:59 pm |
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Joined: Feb 08, 2010
Posts: 10151
Trade Rating: +12
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| macj wrote: |
| nice idea Schumi... but we have to provide a fuel sample which must only contain "pump" fuel...... but I like your thinking |
how about octane booster?
allowed or not? 
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Posted: Wed Aug 17, 2011 1:01 pm |
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Joined: Feb 07, 2010
Posts: 3085
Trade Rating: +12
Location: Essex
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| Seabook wrote: |
| macj wrote: |
| nice idea Schumi... but we have to provide a fuel sample which must only contain "pump" fuel...... but I like your thinking |
how about octane booster?
allowed or not? |
not if it takes it over pump fuel... Shell Optimax, or whatever its called now is all thats permitted
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Posted: Wed Aug 17, 2011 1:54 pm |
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Joined: Feb 08, 2010
Posts: 10151
Trade Rating: +12
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it's a shame that BP discontious their BP Ultimate 102 petrol few years ago....
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Posted: Wed Aug 17, 2011 2:45 pm |
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Joined: Feb 08, 2010
Posts: 901
Trade Rating: +1
Location: Istanbul / Turkey
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Oke. If meth not allowed in rules how about pure water ?
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| 2005 206 RC RED
Bilstein B14 Coilover / Brembo 4 Pot Front 330x28 - Rear 325x8 / Quaife ATB Limited Slip Diff / Janspeed Catback
Lot's of CNC machined customs pars. | |
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Posted: Thu Aug 18, 2011 7:25 am |
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Joined: Feb 07, 2010
Posts: 3085
Trade Rating: +12
Location: Essex
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water injection is permitted.... not what I want to be doing though TBH
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Posted: Thu Aug 18, 2011 11:45 am |
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Joined: Feb 08, 2010
Posts: 7045
Trade Rating: +5
Location: In the garage
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| Seabook wrote: |
so about 220bhp and 200 ft/lb torque.
standard longman gti hit 190 bhp and 170 ft/lb with standard valve and 40mm ITB; with larger valves and higher compression surely can pass 200 very easy. |
220bhp on standard cams? Increased compression and bigger valves won't let significantly more air into the engine.
BHP is a measure of the rate of work an engine can do. The best way of increasing this is simply to fit longer duration cams which allow the engine to rev higher (so it does more work). They are key to a higher BHP figure.
100lb ft / litre is virtually unheard of on a N/A engine.
The Longman engines also had an uprated inlet cam.
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| 2001 GTi 138, Bilstein Sprint dampers, H&R springs, 21mm Peugeot Sport torsion bars, 22mm rear ARB, Peugeot Sport Group A wishbones, 283mm discs, Goodridge stainless hoses, Maniflow 304 grade 4-2-1 2.5" manifold and system, 200 cell cat, Richard Longman head, 45mm Jenvey throttle bodies, 9.5mm TB spacers, 90mm air horns, Jenvey throttle linkage, Jenvey fuel rail, Aeromotive and Goodridge fuel fittings and braided hose, ITG sausage filter, Radtec custom radiator, Piper Ultimate Road cams, Piper vernier pulleys, Omex 600 ECU. Saxo electric PAS pump, Vibra Technics engine mounts. Samco coolant hoses, TTV steel flywheel, 4.76 final drive ratio, 307 CC 180 ratios. 2019 BMW 530i. 2017 Mercedes C300 convertible. | |
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Posted: Thu Aug 18, 2011 12:25 pm |
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Joined: Feb 08, 2010
Posts: 10151
Trade Rating: +12
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| Edward wrote: |
| Seabook wrote: |
so about 220bhp and 200 ft/lb torque.
standard longman gti hit 190 bhp and 170 ft/lb with standard valve and 40mm ITB; with larger valves and higher compression surely can pass 200 very easy. |
220bhp on standard cams? Increased compression and bigger valves won't let significantly more air into the engine.
BHP is a measure of the rate of work an engine can do. The best way of increasing this is simply to fit longer duration cams which allow the engine to rev higher (so it does more work). They are key to a higher BHP figure.
100lb ft / litre is virtually unheard of on a N/A engine.
The Longman engines also had an uprated inlet cam. |
just did a bit of homework you are right
so what's you guess then?
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Posted: Thu Aug 18, 2011 12:51 pm |
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Joined: Feb 07, 2010
Posts: 3085
Trade Rating: +12
Location: Essex
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I am expecting 190 odd hp but the most important thing is the torque. I am hoping to get 175- 180ft/lb with a lot of it low down the rev range where I need it
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Posted: Fri Aug 19, 2011 2:43 pm |
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Joined: Feb 08, 2010
Posts: 10151
Trade Rating: +12
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when will your new engine be ready?
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Posted: Sat Aug 20, 2011 6:12 am |
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Joined: Feb 07, 2010
Posts: 3085
Trade Rating: +12
Location: Essex
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| Seabook wrote: |
| when will your new engine be ready? |
I took the rods and pistons over today (sat) so I guess it will be another week till its ready to re-fit
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Last edited by macj on Sun Aug 21, 2011 6:50 am; edited 1 time in total
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Posted: Sat Aug 20, 2011 11:23 am |
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Joined: Feb 08, 2010
Posts: 10151
Trade Rating: +12
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| macj wrote: |
| Seabook wrote: |
| when will your new engine be ready? |
I took the rods and pistons over today (sat) so I guess it will be another week till its ready to re-fit |
so still got few weeks time before the next event
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