Turbo planning

[snowdog]

I would also like to know the threshold of internals.


When should you think about upgrading the differential?

[xsnapshot]

Originally Posted by xsnapshot

So what truly is the acceptable limit for stock injectors? For example, I am gunning for 300whp on E85 with the JRSC with standard pulley. I've asked three separate Master Ecutek tuners now, and one has said "just injectors", the next said "injectors and pump" and the third said "stick with the stock injectors and get a fuel pump".

So which is it? I have full bolt ons already (if that makes a difference). But if I can safely get away with NOT buying injectors then I would of course love to go that route.


Thoughts?

Bump for an answer!

[D_Thissen]

Originally Posted by GsxrMe

Not all turbos are equal. Some turbos are 250 at 7psi while others are 300 at 7psi. You gotta look at the turbo itself. Some turbos are just oil and others are water/oil.

Study your ass off and look at all your options for all your kits.

I realize that. 7psi on a 2871 vs 5858 are totally different because of the amount of air going through the motor. My goal for power is around 250 to the wheels with quick response. I haven't seen a lot of people with similar goals. Yes there are kits that will make 250, but a lot of people upgrade to make more power. I find it also difficult to sort through all the material because A) there's a million pages B) a lot of side tracked comments and C) just differences in opinions. I could always call vendors, and report back.

[snowdog]

Anyone know limits of internals?

[tyrantcf]

Originally Posted by snowdog

Anyone know limits of internals?

Although people run more, I'd look into building the engine around 400whp.

[KoolBRZ]

Originally Posted by snowdog

270-300whp for clutch. What threshold for AT?

I have an AT and I HAD a turbo. The AT can handle more horsepower than the MT. It just won't let you shift. I strongly recommend a supercharger instead of a turbo on an AT for one simple reason. Nobody has cracked the code of the AT controller, and it won't allow shifting under boost. That's right. Build up some boost and tap the shifter and nothing happens. Flog the shift paddles and floor shifter under boost and still nothing happens. Until they crack the controller code, I recommend supercharging the AT's, since you can quickly let off the throttle, shift, and get back on the throttle, without losing boost. The ideal setup however, would be a rear-mounted turbo acting as a muffler, feeding into a FMIC, then into a supercharger. It could be run with stock exhaust, so could be CARB legal, and you could still pass DEQ with it installed. For cool-looking high horsepower, setup, you could use twin turbo's with air scoops above the rear fenders.

[KoolBRZ]

Originally Posted by snowdog

So to summarize


* 300-350 whp is limit of pump gas
* No fuel system upgrades while staying on pump gas
* Oil cooler suggested regardless of horsepower goals
* Catch can / air oil separator suggested regardless of horsepower goals
* 270-300 whp limit of stock clutch
* 350 whp limit of AT


Anything else to consider?

The AT won't allow manual shifting under boost. You HAVE to let off the throttle to shift manually, and then you've lost boost if you're turbo'd, but you can get right back into boost if you're supercharged.

[KoolBRZ]

So, for the AT's I don't recommend just turbo's or superchargers. I recommend BOTH a rear-mounted turbo, with a front-mounted intercooler, and a supercharger.

[AVOturboworld]

Originally Posted by KoolBRZ

The AT won't allow manual shifting under boost. You HAVE to let off the throttle to shift manually, and then you've lost boost if you're turbo'd, but you can get right back into boost if you're supercharged.

What? We've turbocharged a lot of 6AT's, and never had that issue.

[Andrew025]

Originally Posted by KoolBRZ

I have an AT and I HAD a turbo. The AT can handle more horsepower than the MT. It just won't let you shift. I strongly recommend a supercharger instead of a turbo on an AT for one simple reason. Nobody has cracked the code of the AT controller, and it won't allow shifting under boost. That's right. Build up some boost and tap the shifter and nothing happens. Flog the shift paddles and floor shifter under boost and still nothing happens. Until they crack the controller code, I recommend supercharging the AT's, since you can quickly let off the throttle, shift, and get back on the throttle, without losing boost. The ideal setup however, would be a rear-mounted turbo acting as a muffler, feeding into a FMIC, then into a supercharger. It could be run with stock exhaust, so could be CARB legal, and you could still pass DEQ with it installed. For cool-looking high horsepower, setup, you could use twin turbo's with air scoops above the rear fenders.

Originally Posted by KoolBRZ

The AT won't allow manual shifting under boost. You HAVE to let off the throttle to shift manually, and then you've lost boost if you're turbo'd, but you can get right back into boost if you're supercharged.

Originally Posted by KoolBRZ

So, for the AT's I don't recommend just turbo's or superchargers. I recommend BOTH a rear-mounted turbo, with a front-mounted intercooler, and a supercharger.

[raven1231]

For AT's I recommend running all of them. Start with am electric supercharger for early torque, then a traditional supercharger for mid range power, ending with a large turbo for top end and a shot of NOS here and there for when you need the extra edge.

[cdrazic93]

Originally Posted by Andrew025

When the facepalm and facedesk arent enough;

Face earth

[snowdog]

Can anyone else comment on the AT not shifting at boost?

[Fastbrew]