Highest HP 4g63 engine (from 2007)
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Thread Starter
Former Sponsor
Joined: Apr 2008
Posts: 282
Likes: 0
From: Athens, Greece
Hi,
I didn’t had much time to write,
We stared some Subaru projects recently, one of this tested last weekend.
Running methanol of course as they are trying to hit the world record for Subaru engines and drag strips too.
One of them had 8.87 and 161.78 pass. We had only 3 passes to setup the launch. The boost was only 30.87psi just to see the car at first passes. The drag strip was terrible, just glue only for 160feet and then nothing. 2950lbs weight with the driver.
At the 8.87 pass the car had 1070hp – (850-870whp) at the crank. I couldn’t raise the boost more than 31 psi as I tried and the car was spinning all the drag strip. This engine setup is capable to produce more than 1550hp. We will test it full boost on a regular drag strip shortly.
Keep tuned….
http://www.youtube.com/watch?v=rzt-RpCdO4Y
http://www.youtube.com/watch?v=N_2UeiIcRBg
http://www.youtube.com/watch?v=lGyi37Yn2RU
http://www.youtube.com/watch?v=2Jbv2...layer_embedded
Spyros
I didn’t had much time to write,
We stared some Subaru projects recently, one of this tested last weekend.
Running methanol of course as they are trying to hit the world record for Subaru engines and drag strips too.
One of them had 8.87 and 161.78 pass. We had only 3 passes to setup the launch. The boost was only 30.87psi just to see the car at first passes. The drag strip was terrible, just glue only for 160feet and then nothing. 2950lbs weight with the driver.
At the 8.87 pass the car had 1070hp – (850-870whp) at the crank. I couldn’t raise the boost more than 31 psi as I tried and the car was spinning all the drag strip. This engine setup is capable to produce more than 1550hp. We will test it full boost on a regular drag strip shortly.
Keep tuned….
http://www.youtube.com/watch?v=rzt-RpCdO4Y
http://www.youtube.com/watch?v=N_2UeiIcRBg
http://www.youtube.com/watch?v=lGyi37Yn2RU
http://www.youtube.com/watch?v=2Jbv2...layer_embedded
Spyros
Last edited by Extreme Tuners; Nov 22, 2010 at 02:24 AM.
Spyros, this thread has blown me away, the amount of technical data is overwhelming 
. You are certainly a pioneer and pushing the limits through innovation.
I want to here more about the Subaru project, will it be possible for you to post more info here in NASIOC (North America Subaru Owners Impreza Club) http://forums.nasioc.com/forums/show....php?t=2091420
Is it a billet block? What kind of internals are you using? Are you using head gaskets, o-ring, fire-rings? What kind of compression? Are you using exotic materials? What size of turbo? etc etc
Thanks
Juan Medina
. You are certainly a pioneer and pushing the limits through innovation. I want to here more about the Subaru project, will it be possible for you to post more info here in NASIOC (North America Subaru Owners Impreza Club) http://forums.nasioc.com/forums/show....php?t=2091420
Is it a billet block? What kind of internals are you using? Are you using head gaskets, o-ring, fire-rings? What kind of compression? Are you using exotic materials? What size of turbo? etc etc
Thanks
Juan Medina
Newbie
Joined: Nov 2010
Posts: 6
Likes: 0
From: Finland
First off all our flowbench have diferent measuring units. we measure in 10'' instead of 28''. i can convert it easy if u want a flow numbers. Our flowbench is reading very low measuring with 85mm piston. Also the % that gains is low again. Imagine cosworth instead of 26% intake and 18% exhaust using 1mm bigger valve from stock we seen 15% and 11%. We have as reference from cosworth imporevement head and above.
Eatch cylinder head ported for eatch project specialy. Depents the target of the race car. Some wrc and racing cars wants torque in lower prms and lower lifts some other dragcars the oposite. Its not only the maximum peak cfms but the overall. a cylinder head flowing overall at 720degrees from 5mm lift to 10mm lift 150cfms in 10'' outflows another that flows another that have peak 170cfm from 9 to 11.5mm lift.
Every project is diferent, every ported head is matched with the specific cams and the flow ability of intake and exhaust system. There is a balance between intake and exhaust. U cant use a 130lbs turbo runing 70psi keeping the 30% flow ratio balance intake to exhaust.
We have develop cylinder heads for race fuel that we seen more than 32% peak, and running methanol setup runing no water as we have close all the water passes flowing 45%-48% more than stock. Also we have done some stages keeping the same chamber size and shape using from stock valve to 38.5mm and new valve seats with diferent angles matching diferent angle valves. Valves from 6.5mm stem diameter to 4.5mm all kind of combinations.
For example a cylinder head with 35mm valve and 30.5mm when the peak torque is at 5000rpms Min int.cross sec, area is 659mm2 and 83.3Hz. making the head peak torque to 6000rpms we will have Minint cross sec area 791mm2 creating 100.Hz, keeping the flow ration same we will need 35mm valve stock but with 11.5mm valve lift or 39mm valve at 10.4mm valve lift at the exhaust 30.5mm stock with 9.2mm lift or 32mm with 8.7mm lift. Then u design the peak flow of the cylinder head witch lift. Having bigger valves and deep valve lift to a wrong desing head making the chamber overheating making the power less and retarding the advance. Also the squiz making a bigger valve shading the chamber also have loses in some certain lifts. We have manage to make the VE close to 135% with special design parts.
Sorry i cant write more i have no more time for today.
Spyros
Eatch cylinder head ported for eatch project specialy. Depents the target of the race car. Some wrc and racing cars wants torque in lower prms and lower lifts some other dragcars the oposite. Its not only the maximum peak cfms but the overall. a cylinder head flowing overall at 720degrees from 5mm lift to 10mm lift 150cfms in 10'' outflows another that flows another that have peak 170cfm from 9 to 11.5mm lift.
Every project is diferent, every ported head is matched with the specific cams and the flow ability of intake and exhaust system. There is a balance between intake and exhaust. U cant use a 130lbs turbo runing 70psi keeping the 30% flow ratio balance intake to exhaust.
We have develop cylinder heads for race fuel that we seen more than 32% peak, and running methanol setup runing no water as we have close all the water passes flowing 45%-48% more than stock. Also we have done some stages keeping the same chamber size and shape using from stock valve to 38.5mm and new valve seats with diferent angles matching diferent angle valves. Valves from 6.5mm stem diameter to 4.5mm all kind of combinations.
For example a cylinder head with 35mm valve and 30.5mm when the peak torque is at 5000rpms Min int.cross sec, area is 659mm2 and 83.3Hz. making the head peak torque to 6000rpms we will have Minint cross sec area 791mm2 creating 100.Hz, keeping the flow ration same we will need 35mm valve stock but with 11.5mm valve lift or 39mm valve at 10.4mm valve lift at the exhaust 30.5mm stock with 9.2mm lift or 32mm with 8.7mm lift. Then u design the peak flow of the cylinder head witch lift. Having bigger valves and deep valve lift to a wrong desing head making the chamber overheating making the power less and retarding the advance. Also the squiz making a bigger valve shading the chamber also have loses in some certain lifts. We have manage to make the VE close to 135% with special design parts.
Sorry i cant write more i have no more time for today.
Spyros
And how do you calculate the difference in needed lift (time-area) for 35mm vs. 39mm valves (11.5mm vs 10.4mm)?
Did you find those numbers on google
? some explanations please.You say/write that you have over 1000 crank hp with a 2 liter engine on just 30psi, just over 2 bars and that power on 7000rpm with metanol and a compression ratio of about 12:1?? That's about 65bars of BMEP at 7000rpm, if you divide that BMEP with your abs. intake manifold pressure that is 3bars you get 22bars of BMEP as N/A...is this true? I don't really believe this...convince me!
/Andre'
Thread Starter
Former Sponsor
Joined: Apr 2008
Posts: 282
Likes: 0
From: Athens, Greece
Chuntington101, I suppose to have 55-60psi at ~8800-9000rpms.
I.R.A. fbi, correct.
08LancerEvo, not complete setup only some custom parts and a turbo.
Filin, Thanks
Wilson34, we don’t know yet, possibly gasketless.
Juanmedina, transfer the data to ur forum. I will login when I have time also.
Norrback, as u understand from my personal emails that I reply to u about asking some custom parts for ur project and asking to tell u some more theory, I have limited time first of all analyze further some theory to anyone asks, I can’t even I want it, although I give this for free u should appreciate it than telling me to convince u. I don’t need to convince u or anyone for anything. Don’t ask me anymore how to…, just Google for numbers as u told me.
Spyros
I.R.A. fbi, correct.
08LancerEvo, not complete setup only some custom parts and a turbo.
Filin, Thanks
Wilson34, we don’t know yet, possibly gasketless.
Juanmedina, transfer the data to ur forum. I will login when I have time also.
Norrback, as u understand from my personal emails that I reply to u about asking some custom parts for ur project and asking to tell u some more theory, I have limited time first of all analyze further some theory to anyone asks, I can’t even I want it, although I give this for free u should appreciate it than telling me to convince u. I don’t need to convince u or anyone for anything. Don’t ask me anymore how to…, just Google for numbers as u told me.
Spyros
