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I think there is a difference. Normally, an external wastegate is mounted on a separate pipe from the exhaust manifold. So when the wastegate is opened, some air bypasses flowing through the turbo. If the wastegate is mounted on the exhaust housing of the turbo, the exhaust air always flows into the turbo and then out through the wastegate...so the air never bypasses the turbo.

Guest 570CK

Hope you get good hp.

I got the bill for my car today. Half of the bill was fixing up the fark ups the other shop did.

The dodgy shop grinded a piece out of my turbo!!!!!!!!!!! I didn't spend $2300 on a 800hp turbo so some fark nut could grind it.

Anyway. 2 page list of screw ups.

So good luck rob :)

Sheesh! That is a big turbo!! Almost like that white JUN s15 in Perth with the T88 on it. Which makes me wonder, why didn't you go all the way with a T88? I would have with that sized turbo :) I think lag monster is an understatement :) Anyway, should be fun. Do you use it on the street, or as a strict drag car?

When does the car come on boost? I am guessing it starts to make boost around 4500rpm? 5000rpm?

Guest 570CK

about 4500 u get a large surge.

Depends which t88 he has. My turbo is the same size as the smallest t88. Tho the bigger t88 are 1000hp rating.

I just wanted to go for the Garrett. The T88 never crossed my mind.

It a street car, never set foot on the 1/4 mile. Just want it to be a dyno car with gas.

Guest 570CK
Originally posted by rbs13

that sounds awesome.. i was braggin about getting all crossed up at the end of 2nd.. into 3rd.. pff.. 4ths my new goal..  hey 57ock i seen you getting round brissy a bit.. nice car.. where abouts you go crusing on weekends if at all?

Might go to coast this weekend. Haven't been for 3 months.

Street car? Wow! I am guessing you usually drive off boost, unless you thrash the car around? :) Not sure what T88 it is, but it's been in many mags. I'm sure you've seen/read it. I think it has a 2.2L stroker kit too.

Can I ask why Garrett? Not HKS? I guess Garrett is a lot cheaper than HKS and TRUST. Never thought about a smaller turbo? I mean, I thought a GT30 would be good enough on a SR20. Unless you are chasing insane power like 600hp+? Is that what you're chasing??? How much boost are you running and what's your power output?

Guest 570CK

Yeah I've seen that Jun s15. Goes very well.

I'll stop soon as I get 500rwhp

At the moment its only running 14psi as it still has stock internals.

Which are getting replaced hopefully at the end of the year. Was running 17-18psi when I took it too dyno shop.

I'll get a kw figure tomorrow for my pissy 14psi :) over 230 for 14psi over 270 for 17 going by one of the work man there

Well its all done. Cars damn noisey now with the external gate, might have to look into some sort of resonator to keep the noise down even with a external wastegate line that plumbs back into the exhaust. I'll attach the dyno sheets, there are 2, one shows the boost and how quickly (or slowly I should say) it comes on the other shows my afr. The power curve is quite ugly midrange where the stock ecu dumps a whole heap of fuel into the map and then by the top end its sitting about right where its making huge amounts of power. The car is much quicker, as you can imagine, but the lag is quite bad. Firstly I need to reset my sbc as all the functions have been dropped cos the battery was disconnected for so long. Now I definately need a bigger fuel pump, bigger injectors and then I can think about a new ecu to fix up my ugly power curve. Its pretty promising so far, I just wish it wasnt so laggy, but that can be partially fixed by setting up the gain correctly on my sbc and then with a new ecu and advancing the ignition maps a bit. I think we can safely say I will reach 400hp by the end of it at the treads quite easily.

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