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-7/9s Or -5s Garretts

Adz2332

By Adz2332,
in Engines & Forced Induction

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(OO)SKYLINE(OO) Grand Master

(OO)SKYLINE(OO)

Posted
Posted

I run -7's with a shitty exhaust and stock afm's. With id1000's and a walbro 400 fuel pump I make 325kw on 20psi with E85. If I fix my exhaust and chuck some bigger afm's on I'd probably crack 350kw.

It'd be much easier to do it with -9's and I don't think there would be much more lag involved.

What exhaust you going for?

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R31Nismoid
R31Nismoid

Gospel huh? Considering im making a lazy 250rwkw @ 12psi with GT-SS, and I know of at least another 10 cars making over 300rwkw (between 300-330rwkw) on 20-22psi… On various dynos to boot (more on th

discoPumpkin
discoPumpkin

Ants is right, lag and no responsiveness should be a crime or atleast punishable under the anti gay laws. It's beyond me why the hell people r so intent on makin there car run like a pig, and if peop

Ants
Ants

The quality of retard bingo in here is heavily retarded.......................to the point that I'm inclined to think this thread has well and truly served its purpose and should be closed. GTR_JOEY

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Piggaz Grand Master

Piggaz

Posted
Posted

Ok, had a play.

Your car is obviously tuned in 3rd gear going by the speeds. It's a bit rough but you get the idea.

3950: N= 176 P= 215

4400: N= 252 P = 300

4800: N= 306 P = 375

5244: N = 326 P = 415

5644: N = 344 P = 445

6100: N= 350 P= 460

6500: N = 342 P = 472

Take into consideration how they were loaded up for the runs and whatnot.

TheGeniusMoose Contributor

TheGeniusMoose

Posted
Posted (edited)

Just out of curiosity...

I have a set of -5s on my std RB26DETT and i'm only making 300kw on 22psi...

The things I noticed are my actuators are set at 8psi and I have 600cc injectors coupled with a Walbro 255 pump.

Are these going to be an issue or is it a tuning issue?

EDIT- Using 5speed from RB25 and 4.08 S14 Diff in an S15

Edited by TheGeniusMoose
TheGeniusMoose Contributor

TheGeniusMoose

Posted
Posted (edited)

Thats what im trying to figure out! My injectors hit 100% duty cycle on full boost thats why I thought my pump or injectors were maxing out but doesnt make sence I should be making 300kw on less than 20psi id have thought...

Previously I had valve float but that has been rectified.

Edited by TheGeniusMoose
gtr jet Veteran

gtr jet

Posted
Posted

What exhaust you going for?

Nothing at the moment as I'm content with the power. I think I'll get more gains if I upgrade my actuators 1st and see how I go.

Eventually I'll rip the cat out and the 3" exhaust and replace it all with 3.5".

levinboy Grand Master

levinboy

Posted
Posted

Ok, had a play.

Your car is obviously tuned in 3rd gear going by the speeds. It's a bit rough but you get the idea.

3950: N= 176 P= 215

4400: N= 252 P = 300

4800: N= 306 P = 375

5244: N = 326 P = 415

5644: N = 344 P = 445

6100: N= 350 P= 460

6500: N = 342 P = 472

Take into consideration how they were loaded up for the runs and whatnot.

Was 4th gear he doesn't tune in 3rd

Piggaz Grand Master

Piggaz

Posted
Posted

Well the 255L was an upgrade on the SR lol. What should I be aiming for when I buy a new one?

The pump provided its getting the right voltage should have an issue with that power. I think it's time to put your inspector gadget hat on and start investigating.

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

I'd say, once again, attention to detail on the setup is where the better results are. Big, size matched exhausts blah blah.

Got a sheet Nick?

Exactly.

I had 340rwkw with -9s on 98, but it wasn't a stock engine - and that is where the extra bits/gains come from

(OO)SKYLINE(OO) Grand Master

(OO)SKYLINE(OO)

Posted
Posted

Nothing at the moment as I'm content with the power. I think I'll get more gains if I upgrade my actuators 1st and see how I go.

Eventually I'll rip the cat out and the 3" exhaust and replace it all with 3.5".

I see!

An actuator upgrade will do it good.

Yeah, if you want to get over the 350 rwkW mark, go 3.5".

Exactly.

I had 340rwkw with -9s on 98, but it wasn't a stock engine - and that is where the extra bits/gains come from

+1

TheGeniusMoose Contributor

TheGeniusMoose

Posted
Posted

Other thing is the turbos are REALLY laggy.

I get 18psi by 6000rpm and power drops off completely at 22psi at 7500rpm so theres no point revving past there...

The pump provided its getting the right voltage should have an issue with that power. I think it's time to put your inspector gadget hat on and start investigating.

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