Turbine A/R

[nab911]

I was reading the other day in here when someone and dee were going at it about turbos and fighting between t3/t04 and BB turbos. Anyways, i have a company getting me a great deal on a turbo and i want to know what my limit will be on turbine a/r's because dee said that a .63 will get out of boost between shifts and i definatly dont want that. He runs .48 but that may be too low. So whats everyones opinion on turbine a/r's because im getting a T3/T04e with a .70 compressor a/r with 46 trim and whatever turbine a/r i decide to get after yall argue for an hour .

[USDM_OneVia]

Well.... here is my 2 cents.

stock is .49. Good for low end, instant spool, but horrible top end.

SR is .64. Probably the best of both worlds, still good on low end, very little lag, and a bit better top end. Plus if you can track down an S14/S15 SR T28, you get a ball bearing center which is going to spool quicker.

Choice is basically yours and what trade-off is better for you. Do you want a better top end, or a low end grunt? It's all pretty much up to you.

I want something that is going to pull hard in any gear I am in, even from the low end. So I would want something with a smaller A/R. I don't do any driving over 5k, so something with a large A/R is just going to be overkill for me and frankly a waste of money. Best choice for me..... S14 T28.

Joe

[nab911]

Well i think im going to get the turbo i was looking at which is a .7 compressor a/r and 46 trim with a .6 turbine a/r. Its a semi trade off and will still give me hella top end power and still have the spoolability. Plus with dee's bad *** designed manifold and hopefully some 3"+ exahaust and good fuel management ill be able to make it spool even sooner.

[ca18det_boy]

Don't really know much about A/R and all the other stuff but I do know that D know's his stuff.....

[nab911]

Yeah, dee runs a .48 but that may be too small. Im going to get the .6 and just get my engine tuned enough so that it doesnt drop out of the boost span when i shift.

[boost_boy]

Quote »Yeah, dee runs a .48 but that may be too small. Im going to get the .6 and just get my engine tuned enough so that it doesnt drop out of the boost span when i shift.[/quote] Too small for what? Yo can use a .63 housing, but like I stated before you will know what lag is and you will get smoked on the streets because you're waiting for your boost. On the rollers, the .63 will help you gain a few more ponies, but your power will still come on later than you probably care to know. I've gotten over 300whp off a .48 housing and my boost response is phenomenal; even on the top end. Works for me! you're free to try whatever you like, though......

Dee

[Rookie_ca18]

A dee by any chance do you have some free time this weekend, and would like to take a lovely trip to ft.lauderderdale . Just wanna talk to someone in person about the motor and stuff, if ya get any free time ([email protected]).

[quest]

what turbo company? this deal for anybody ?u didn't state a power goal

dropping outta boost depends on what wheels you're using also. More of a problem with heavier ones and small displacement motors.With something like a 60-1 and a stage3 in a 0.63, u will have probs.With a 46trim comp I'd run a stg1 in a 0.48, clip it for top end.I remember http://www.jgstools.com saying he built a t3/0.48/stg1/to4B with an S? trim comp wheel that dyno 375 hp on a mazda 1.8. stg1 is standard t3 wheel. Hit him up for specs. Think price was good too. Should work great on a ca18

USDM_OneViaI think he is referring to t3 A/Rs, not t25

[boost_boy]

Quote » dee by any chance do you have some free time this weekend, and would like to take a lovely trip to ft.lauderderdale . Just wanna talk to someone in person about the motor and stuff, if ya get any free time ([email protected]).[/quote] Won't be off till sunday. New job is occupying all of my time with training.

Quote »dropping outta boost depends on what wheels you're using also. More of a problem with heavier ones and small displacement motors.[/quote] Indeed!

Quote »With something like a 60-1 and a stage3 in a 0.63, u will have probs.[/quote] True!

Quote »I remember http://www.jgstools.com saying he built a t3/0.48/stg1/to4B with an S? trim comp wheel that dyno 375 hp on a mazda 1.8. stg1 is standard t3 wheel. Hit him up for specs. Think price was good too. Should work great on a ca18[/quote] This does sounds logical to me.

Dee

[nab911]

Well the company hasnt responded as to whether i can get the .48 backhousing but i can always buy one and put it on later. But, i think ill be alright with the .60 and if not, ill jsut get a .48 backhousing later but the turbo says it can flow up to 20 psi safely, and 25 max and will get an easy 500 horsepower with the 46 trim. If you want the deal, just email blaast performance about an auction you saw on ebay and were wondering if you could get the same price. And at the same time, just look on ebay because they list a lot of em.

[nab911]

Well i got a response from them. Im getting a t3/t04e with a .7 compressor a/r and 46 trim with a .60 turbine a/r stage 2. Its oil cooled only, no coolant. And it has a 360 degree thrust plate. It also is coming with an inlet fitting, all the studs for the fittings, heat shield and a cast iron downpipe piece. All this for $380 shipped... Ill post again when i get it in and find out if it lags bad.

[gani]

well like boost boy said the .63ar turbine housing is gonna be laggy and how would i know? i had it on my ca on tuesday before a thrust bearing in the turbo decided to let go so thats that. but spooled up from 3200rpm and hit full boost at 4200rpm. it was quite fast when it kicked in but too high of a spool time for comfort if you ask me. so now im putting a .48 housing on the turbine and see how thats gonna run. ill probably try a few more wheel combinations before i settle for something for sure. my 2 cents...........

[boost_boy]

Just drove a friend's 240 tonight with CA, custom header manifold, 550cc injectors, SDS standalone, FMIC, HKS wastegate, and T3/T04E stage III .50 A/R and a .48 rear housing and that thing still was a bit lazy till about 4300rpm. Big exhaust housings on a street car with a CA18DET wil get you all smoked on the street. You don't have to listen to me; I've never worked on a CA18 before nor do I have experience with multiple turbos on the CA18DET engines. And I don't care if Kenne Bell built your engine, the CA18 will lag with a .63 housing "Point Blank".

Dee

[ca18det_boy]

I've never worked on a CA18 before nor do I have experience with multiple turbos on the CA18DET engines. Dee

*cough* bullsh*& *cough*:D

[slw240sx]

what about a .86 on the gt25r's think this will be a little to laggy?

[quest]

how much power r u lookin' to make ?SR guys report 4200 - 4500 rpm full boost using 0.86 housing. Some say cam and intake made spool even slower ? Anyway I can't see our 1.8L doing any better.I dunno about all this GT turbo buzz.... at least the small frame stuff, seem to be too hyped up. Some have been heralded as 400whp turbos and all have come short. Then u throw cams, intake manifold, etc at the motor chasing higher hp figures and torque falls off (not good).380whp/300tq for example. For a $1000+ turbo? lotsa $600 t3/4 will smoke 'em and equal or better the response.Most impressive "small" turbo'd sr I know of had a custom t04b cover, v-trim comp wheel and can't remeber turbine wheel, but it was old school stuff that definitely put it down.FP big28 also made ~330whp/335tq on a bone stock sr with a jwt ecu (thats right, no custom tuned ecu job here), no cams, no intake, etc.. It ran a 12.2 @12X mph in a full wt s13, to back it up. Very impressive for a "small" turbo I think. A 2nd gen dsm with standalone dyno'd 348whp/376tq on the dsm version big28 that has smaller housings. Look at the torque. FP may be a bit pricey ($750 although I understand price may have dropped?) for an upgraded turbo, but can't argue with the results. They claim they use GT wheel/s? and some say turbine is clipped. They're kinda secretive about specs, which I can understand, but if I'm spending my money I'd like to know.I've seen one sr guy buy a new t28 I believe is the non-ball bearing verion of the s14 t28. Has a t3 compressor cover & wheel. Cost ~$650 shipped, brand new complete, from sr20performance.com ? not a bad deal.I prefer to concentrate on torque figures because its what gets u down the road, shoves u back in the seat and will make the car more fun on the street where u do 99% of your driving.I wouldn't wanna run more turbo thru the restrictive stock exhaust manifold anyway.... backs up too much heat in your motor. very bad

[slw240sx]

im looking for 300-400hp at the wheels. i cant decide on what turbo. i dont know enough about them to decide. im looking at the gt25 cause it will get me to 350 hopefully and not take to much fabricating, but then again i could spend half get a t3 then drop upto 1000$ on a manifold and 300 or so on a gate and be good. im really needing to get a choice made while i have the money

[slw240sx]

i also drive the car constantly at 3k or 4k i like running around in lower gears in my power band and this motor loves being right up there in the revs

[boost_boy]

Quote »Most impressive "small" turbo'd sr I know of had a custom t04b cover, v-trim comp wheel and can't remeber turbine wheel, but it was old school stuff that definitely put it down.[/quote] I think it has been the most impressive turbo for the CA18DET as well. On my G/F's old car I had a T3/T04B stage 1 with .60 A/R and .63 rear housing and that little turbo rocked some serious fun into her sentra. With this turbo, I did the most killing of everything that wanted a highway race. Victims to include: Z06 vettes, C5 vettes, too many mustangs, too many hondas, a few acuras, turbo charged MX-6 with big boost, WRX, IS300(turbocharged), S2000, Z32 TT 300zx, AudiTT, multiple volkswagen 1.8t thinga-majiggies and honorable mention 2k2 Ferarri Modena until I crashed.

So I could only imagine what a T3/T04B stage 1 with .48 rear housing is capable of! My biggest power on that turbo was 312.whp@18psi and that was mainly because the injectors were over 100% duty cycle.

Dee