Thread: The build has begun VE-T

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2009-12-04 18:33:40

#31

alfsentra

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good luck my friend!

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2009-12-04 23:33:55

#32

crackerjack Online/offline status of crackerjack is unknown

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Fantastic build mate.

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2009-12-05 13:34:20

#33

DDSC Performance Online/offline status of DDSC Performance is unknown

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Originally Posted by jpsr20det

Individual coils ,plans are 750+whp on 11 cr pistons and staying under 32lbs , that is why 1 of the main reasons Im going to use direct port with important cuantity of meth for under 650whp .Probably race gas and water to try to archive the goal and some other products.
Regards...

What most people don't realize is high compression is a good idea on a ve+t. The rules are different to det. The reason being you have 2 sets on cams. On a det too high compression and big boost can cause dangerous cylinder pressures especially in the mid to higher rpm. However people need to understand there is a difference between static compression and actual compression through the engine cycle.

On a det you can run higher static compression with bigger overlap cams, however this often makes the bottom end very doughy and unresponsive. But on a ve+t you get the responsive benefits down low high of compression and no overlap but as soon as the cams switch to the high overlap high lobes you are effectively lowering the actual compression the engine is running.

I think your set up will work very well. The n1 cams have plenty of overlap to run 11:1 comp. Just might need to switch to the high lobes a bit earlier than normal to keep things safe.

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2009-12-06 23:57:06

#34

jpsr20det

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DDSC PERFORMANCE figured out how this works on a ve...
cheers and thanks!!! Hope this goes well !
Regards.

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2009-12-07 00:02:58

#35

P10FTW

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Originally Posted by DDSC
What most people don't realize is high compression is a good idea on a ve+t. The rules are different to det. The reason being you have 2 sets on cams. On a det too high compression and big boost can cause dangerous cylinder pressures especially in the mid to higher rpm. However people need to understand there is a difference between static compression and actual compression through the engine cycle.

On a det you can run higher static compression with bigger overlap cams, however this often makes the bottom end very doughy and unresponsive. But on a ve+t you get the responsive benefits down low high of compression and no overlap but as soon as the cams switch to the high overlap high lobes you are effectively lowering the actual compression the engine is running.

I think your set up will work very well. The n1 cams have plenty of overlap to run 11:1 comp. Just might need to switch to the high lobes a bit earlier than normal to keep things safe.

Best explanation so far, my brother tries explaining this to me but I it just wouldn't stick. lol

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2009-12-07 00:10:09

#36

sr20vet414 Online/offline status of sr20vet414 is unknown

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Does Anyone Have A Aftermarket Sr20ve Top Feed Fuel Rail!!!! I Will Pay Top Dollar!!! Please Call Me 718-300-2021 , Thanks Jason

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2010-07-21 02:23:12

#37

Phat_sx

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old thread i know but can someone help clarify this? im always looking to learn something new....

Static is cranking pressure/idle pressure in chamber? and actual compression is what? cylinder pressure during boost?

so correct me if im wrong but higher cr in the ve-t will give you better low end response. but in boost the lobes switch and bc of the overlap "lowers" the once said high cr?

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2010-07-25 20:57:58

#38

ross.cottrill Online/offline status of ross.cottrill is unknown

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i would love for jp to update this thread,anyone know of whats going on with his build and what kinda numbers he maid??

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2010-08-03 02:53:23

#39

jpsr20det

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Hi guys thanks for the interest ... I have not been on the forums lately...regarding to the motor...

now its a 11.5 cr custom pistons with valve relief n1 intale mani n1 cams , Im going to start the build in aprox 2 weeks , this will be my last sr20 guys ..Im doing another car at the moment ( just bought a new toy) Im going for all this time, As soon a finish the motor it will be dynoed with all the info you need, now its time for a AWD car and another plataform, not and EVO

thanks..!!

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2010-08-03 03:16:53

#40

THE_FUGITIVE Online/offline status of THE_FUGITIVE is unknown

SR20 Spex-C**T