Pump Gas Turbos

[Iceman]

See i really want the FP3065 because of the power it can supply. The lag would diffenity be there no dout but the power! I saw a 4g63 2.0L see full boost oon one at 5.5k RPM I would bet i could get 5k RPM with cams on a 4g64 which would be some lag i would imgaine.

Comments?

FP3065> 50trim (stage 3 exh)?

[Shane@DBPerformance]

Those 2 turbos are not in the same league. Maybe something inbetween?

Cams make turbos spool slower, BTW. A 5k spoolup on a 4th gear pull would be considered very laggy. Your normal T3/T4s are going to spoolup around 3800-4000 on the street in 4th gear on a 8.5:1 comp 2.0l. Your T25 probably spools around 2500. A 14B spools around 2800. A 16G around 3000-3200. Judging by Nash's dyno charts I would guess his old 20G would spool around 3400 on the street in 4th gear.

Gear makes a huge difference on spoolup RPM. The higher the gear, the lower the RPM the turbo spools at. A turbo that hits decent boost at past 5000 in 4th gear might not be able to even reach full boost in 1st gear at all. I had a very laggy setup on my car at one point. It didn't reach full spool until very high 4000s. In order to keep power going and boost up between shifts in the lower gears you had to shift it extremely fast and concentrate on the shift. If you only shifted very fast, then you lost so much of the spool that you had a decent amount of nothing in the next gear. That is one area though where dual ball-bearing turbos make a big difference. They don't help an extreme amount on intial spool, but between shifts they retain most of their momentum and spool right back up quick even if you don't keep the gas to the floor during the shift.

A 4G64 is going to make a decent difference in spoolup though. A 50-trim spools ok even on a 7.8:1 compression 2.0l. On a fresh 8.5:1 comp 2.4l you should be able to step up to something a bit bigger and still get good spool.

[Iceman]

You got a point about not building full boost in 1st gear or so i hear. I will have a stutter box set-up for this FYI. I'm wondering what RPM a 56 trim get full boost at? Basicly i'm leaning towards a 50 trim with 272 cams. Is there a trubo close to a 50trim-56 trim that is BB cause i can't think of one off hand but that would work well.

[Shane@DBPerformance]

FP3052 and other GT37 comp wheeled hybrids. I am sure someone could make you a 60-1 or 60-trim dual bb, if you really wanted.

[Iceman]

I'm not looking to spend more than 1k on the turbo but if i got something like that than i would be happy. Well the FP3052 can support 520 HP (est) which sounds good to me but is still up there in cost... WE WILL SEE THOUGH!

Thanks

[Shane@DBPerformance]

I would go with something bigger than a 50-trim, if you really want 450whp on pump gas. Dre did it, but unless you plan on spending 6-months tuning your standalone everyday for hours and blowing numerous headgaskets then just get a little bigger turbo like a 60-1 and make it easy for yourself. The 2.4l with spool a 60-1 non-bb no problems. You can save the BB money for a built tranny, sheetmetal intake, standalone fuel management, FMIC, 720+cc injectors, cams, engine internals, and the hundred other things needed to finish a major build up.

A 450whp car is handful though. Going right from a 200whp modded T25 car to 450+whp car is an easy way to get yourself killed. Nash ran his 11.2 making around 425whp. And be ready for some downtime once in a while as random parts start taking turns breaking.

Your probably not going to be street racing everything you come across as much either. You will have to worry about weither or not its worth possibly breaking something, getting someone killed, or getting the car you just spent $$$ on getting impounded by the cops. Going from a T25 that does 0-60 in about 6.x seconds to a car that can do it somewhere in the mid 3s on street tires you might find racing the Hondas and Cavaliers at the normal summer street racing spots a waste of time and a bit dangerous.

[At-Least-It's-An-Evo]

Originally posted by ecoli@Dec 31 2003, 03:14 PM
A 450whp car is handful though. Going right from a 200whp modded T25 car to 450+whp car is an easy way to get yourself killed. Nash ran his 11.2 making around 425whp. And be ready for some downtime once in a while as random parts start taking turns breaking.

Your probably not going to be street racing everything you come across as much either. You will have to worry about weither or not its worth possibly breaking something, getting someone killed, or getting the car you just spent $$$ on getting impounded by the cops. Going from a T25 that does 0-60 in about 6.x seconds to a car that can do it somewhere in the mid 3s on street tires you might find racing the Hondas and Cavaliers at the normal summer street racing spots a waste of time and a bit dangerous.
Amen.

[PSI2HI]

56 trim for low boost pump gas.

50 trim for high boost race gas.

We've got my 56 trim on 20 psi 92 octance making 408 whp on a overrun 2G MAS and a AFC.

Nick

[1ViciousGSX]

My VPE .56 trim/GT30 BB hits full boost by 3500-3600rpm with 272/272 cams. The 2.4L will drop that by 1000rpm. Hopefully I'll be able to tell you for sure soon.

[Shane@DBPerformance]

Originally posted by 1ViciousGSX@Dec 31 2003, 05:15 PM
My VPE .56 trim/GT30 BB hits full boost by 3500-3600rpm with 272/272 cams. The 2.4L will drop that by 1000rpm. Hopefully I'll be able to tell you for sure soon.
You have the smaller 700177-12 aka HKS GT3037 56-trim 55 lb/min wheel though right? Not the 56-trim comp wheel orginally from the GT35R that I assume we have been talking about.