T28 horsepower - Page 2 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Blacksilvy · 04-06-2008, 04:36 PM

I dunno if this would apply here but just throwing it out here

http://forums.nicoclub.com/zerothread/213470

*Def* · 04-06-2008, 04:59 PM

Quote:

Originally Posted by blu808

I was ref to the 256 step 1's.

He asked if they made a big difference over stock. I replied that it is a bigger difference if you go with step 2 264's or bc 264's.
And that the step 1's had a power band closer to stock than that of a step 2.

Also with the t28 if you used anything larger than step 1's it would just suck all the cfm's out of the turbo.

Please stop spreading misinformation. I'll say it yet again, powerband is primarily dictated by camshaft duration, not lift. The difference between a Step1 and Step2 cam is lift.

...and "suck the cfm's out of the turbo," seriously?

*Def* · 04-06-2008, 05:00 PM

Quote:

Originally Posted by Blacksilvy

I dunno if this would apply here but just throwing it out here

http://forums.nicoclub.com/zerothread/213470

You're right, it doesn't apply here. What does a GT2871R have to do with a Gt2560R?

blu808 · 04-06-2008, 05:23 PM

Quote:

Originally Posted by Def

Please stop spreading misinformation. I'll say it yet again, powerband is primarily dictated by camshaft duration, not lift. The difference between a Step1 and Step2 cam is lift.

...and "suck the cfm's out of the turbo," seriously?

You apparently have no idea what I am talking about.

Blacksilvy · 04-06-2008, 06:57 PM

yup was worried about that, saw the number 28 and got confused to an extent and such lol sorry guys

Taj · 04-07-2008, 10:55 AM

I am sure u heard about google Get to searching man

*Def* · 04-07-2008, 09:39 PM

Quote:

Originally Posted by blu808

You apparently have no idea what I am talking about.

As a mechanical engineer, I will freely admit that the only time I would ever expect to hear "suck the cfms out of the turbo" is at the end of a geeky engineering joke. Since you're being serious, I think it's you that doesn't have any idea about what you're talking about.

I know plenty about internal combustion engines, so tell it to someone you can fool on the internet with your highly technical "sucking cfm's" speak.

bshotts · 04-07-2009, 08:40 AM

Quote:

Originally Posted by Def

As a mechanical engineer, I will freely admit that the only time I would ever expect to hear "suck the cfms out of the turbo" is at the end of a geeky engineering joke. Since you're being serious, I think it's you that doesn't have any idea about what you're talking about.

I know plenty about internal combustion engines, so tell it to someone you can fool on the internet with your highly technical "sucking cfm's" speak.

I think what Luke meant by saying "suck the cfms out of the turbo" was simply this; as your IC engine is essentially an air pump (suck, squish, bang, blow) and the amount of air (CFM) entering/exiting is dictated by a number of things, with one significant factor being intake/exhaust camshaft duration/lift. Excluding the additional air volume supplied by a turbocharger, the engine can only move (flow) a given amount of air up to a certain efficiency (engine volumetric efficiency) usually being a 100% maximum VE at certain points in the powerband. By adding additional compressed air, as is the case of adding a turbocharger to the mix, you can essentially have greater than 100% engine VE by adding that additional volume of air (more CFMs).

However, if for example your air pump (IC engine) flows 500 cfm and your turbocharger flows 200 cfm, you theoretically have an air pump capable of moving 700 cfm. By adding camshafts with X duration/X lift, your air pump now flows 750 cfm alone, for example, and your turbocharger still flows only 200 cfm, your camshafts now dictate the maximum amount of air the engine can push through. This would most likely be the case for an engine with a relatively small turbo and insanely large duration/lift cams....ie an SR20DET using a T25 with 272 intake/exhaust cams. Does that make sense?

Sileighty_85 · 04-07-2009, 10:37 AM

Dyno T28 R/T SR W/Stock ECU, MAF, Injectors

You can get more with proper upgrades and tune

LongGrain · 04-07-2009, 11:03 AM

this is an old thread..

*713kouki* · 04-07-2009, 11:56 AM

GT2871R, fmic, tomei supreme headers, 3' exhaust, Nismo 740cc injectors and a good tune ... thats what i'm getting for my s14 , easy reliable 300hp ?

04-07-2009, 10:37 AM	#39
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Wishing Back in Okinawa -_- Posts: 2,508 Trader Rating: (0)	Dyno T28 R/T SR W/Stock ECU, MAF, Injectors You can get more with proper upgrades and tune __________________ 後輪駆動車１番 1991 Built SR GT2871R -363whp 1998 S14 W/RB25- Rebuild in Progress

04-07-2009, 11:03 AM	#40
LongGrain Post Whore! Join Date: Sep 2006 Location: Midwest Posts: 2,647 Trader Rating: (3)	this is an old thread.. __________________ D*squad!

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04-06-2008, 04:36 PM	#31
Blacksilvy Join Date: Apr 2008 Location: Louisville, KY Age: 22 Posts: 42 Trader Rating: (0)	I dunno if this would apply here but just throwing it out here http://forums.nicoclub.com/zerothread/213470

04-06-2008, 06:57 PM	#35
Blacksilvy Join Date: Apr 2008 Location: Louisville, KY Age: 22 Posts: 42 Trader Rating: (0)	yup was worried about that, saw the number 28 and got confused to an extent and such lol sorry guys

04-07-2008, 10:55 AM	#36
Taj Leaky Injector Join Date: Feb 2007 Location: Brooklyn New York Posts: 130 Trader Rating: (0)	I am sure u heard about google Get to searching man

04-07-2009, 11:56 AM	#41
713kouki Premium Member Join Date: Jul 2008 Location: n.w. houston Age: 21 Posts: 94 Trader Rating: (2)	GT2871R, fmic, tomei supreme headers, 3' exhaust, Nismo 740cc injectors and a good tune ... thats what i'm getting for my s14 , easy reliable 300hp ?