boost???

[pushnlacs]

hey whats up? i know this is a pretty stupid question and youll probly think im a dumb *** but this going to be my first turboed ride so. i was just wondering because i hear how a turbo will hit full boost at say 4000rpm. does that mean you get boost befor that but its at full power then or do you not get any power until then????

also why is everyone saying the turbos to hit 400hp(flywheel) are to laggy? the guys at phase 2 motortrend said the hks gt-rs will make 400+ and be at full boost by 3800-4000rpm and that the power curve would be instantaneous considering the stock s13 turbo hits full boost at 3200rmp, i would think 800rpm isnt that big a deal is it???

thanks i appreciate the help im really looking foward to a s14, just trying to get all the fact so thanks again

[MainEvent212]

boost moves up just like RPMs do...when you floor it, you're just not automatically at 6k rpm...it has to move to get there as you speed up progressively...that's why in a turbo car (especially big turbos) you get the feeling of a accelerating plane...it's progressive (slowly increasing boost as RPM's rise at full throttle) it's a great feeling...but to answer your question

boost comes on little by little...so like 3200 rpm and you're at FULL boost...but 2500 rpm...you'll be at (pulling a # out of my butt cuz my SR has been out of comission for so long i dont remember) 6 psi (14psi max)

[Fenvy]

stock s13 turbo, nissan t25 is a slow spooling journal bearing, the hks turbo is probably engineering to be more efficient and dual ball bearing which yields faster spool and more power. phase 2 is probably talking about the gt25r or something? I went the cheaper route to get the s14 turbo which is a stock, single bearing t28, when it blows I am goign to get s15 t28 which is a dual bearing turnbo

[MainEvent212]

oh, well the GT-RS is an engineering poster child

it'll also make u broke like a rock star crack head

[Fenvy]

what's engineering poster child?

[pushnlacs]

cool, so its kinda like building g force you hit the gas and u get pushed harder and harder till your at the max??? man that sounds fun, iv never even been in a turboed car, it sucks.

oh another thing i know obveously boost will build quicker when you floor it but it while still build up even when your not flooring it right? i mena you dont got to be flooring your ride all the time to take off right? you can just hit the gas enough and still take off quick right? i know you all are probly thinking i stupid *** all but what can i saw im turbo iliterate(spellin???) but i plan on changing that asap. you guys are cool i appreciate the help.

[drifter_for_life06]

simply put: The higher the RPM the higher the boost the more horsepower output: that is if its full throttle. You can be at say 5-6k rpm and be only half boosting

[pushnlacs]

all of your opinions about enjuku racing is that they are reliable and can be truted correct?? cause ken said he could send me a stage 3 s13 sr20det redtop that will push around 400hp at the crank using a turbo based on the t25 that will hit full boost at 3800rpm for $8000. thats a pretty damn good deal if you ask me. what do you think??

[drifter_for_life06]

sounds like a nice deal to me as well

[pushnlacs]

thats what im saying. what have your heard about enjuku???

[drifter_for_life06]

what have i heard personally?

[pushnlacs]

yea what have you hear, oh and are you pretty experience with the sr20det?? would 400hp at the crank be reliable and would you say full boost at 3800-4000rpm is good?? or would it be better just to go for a 350hp car?? 350 should get you a 12.4 or so with some weight taken off right?? thanks man

[Nismo_Freak]

yea what have you hear, oh and are you pretty experience with the sr20det?? would 400hp at the crank be reliable and would you say full boost at 3800-4000rpm is good?? or would it be better just to go for a 350hp car?? 350 should get you a 12.4 or so with some weight taken off right?? thanks man

Kinda laggy in my book, and I'm willing to bet that's their T04E kit which uses typical journal bearings.

If you have little experience with turbo cars in general I'd HIGHLY suggest working from a stock platform and moving up once you gain more experience. Jumping in feet first is often a good way to get yourself killed in this form of sport.

Don't get tied up in numbers either. I know it's about all you can tinker with now, but get a stock turbo setup running and move up in increments to see if it something you truely think you can live with, and/or handle.

[pushnlacs]

so 3800-4000rpm is kinda laggy huh?? thats what im most worried about. not to sound ****y or nothing but im a good driver, drove a 5.0 year long in chicago winters and trust me i got that thing got side ways plenty of time(some times on purpose sometimes not). i know how to handle a car so thats all good.

thing is i really wanted to build a bad *** summer car(i got a winter car) that has tall hp but i dont want a v8 i really want a import cause i dig their vibe. but the only imports that you can get high hp out of with no lag are expensive as hell(aka. supra, skyline ect.) but i guess hp really isnt the important thing like you said, what i really want is a low 12 sec street car plain and simple. i really like the s14's but like i said i want a low 12 sec summer ride to bust out every summer and haul ***. do you think a sr20 with the s15 turbo pushing 300whp and suspension and clutch/flywheel upgrade would run low twelves with like 100-150lbs taken off?? thanks man i appreciate it

[pushnlacs]

hey i just talked with one off the guys from phase2 by email (how late are they f'in open?) and i think i found the perfect solution. the hks gt25/30 he said it will produce 330whp-360whp with instant boost response and amazing power curve since its right between the s15 turbo(3700rpm) and the gt-rs(3800-4000rpm) that sound pretty damn good i think the s14 w/ sr swap might really be the car for me.

[Doomed2Walk]

Well, for a 12 second car, you can achieve that with more than just raw power. Suspension/wheels+tires/weight reduction/practicing launches. I'm not looking for 300+ HP right now, so I'm just sticking with "basic" goodies on my S14 SR. fmic/fuel pump/dp+tp/exhaust/intake. Luckily I got a S15 turbo with my motorset

[pushnlacs]

yea see i dont really want a weak little 250hp ride, i want a mean mo fo. so that when summer time comes round i can have some fun but i think the gt25/35 turbo will do the job phase2 said 340whp or so will be produced using it and full boost will be befor 3500rpm, thats bout the same *** the s15 turbo!! hell yea. phse 2 sound bout the best shop to deal with, enjuku is cool but phase2 said labor for everything needed on a 340whp sr will only be $200 and touge well i dont know about because its a known fact that you cant get 330whp out of a s14 turbo and they said you can.

[Doomed2Walk]

200 for labor??? THAT IS CHEAP! :o Touge may have made a mistake when talking to you, because when Dave and I were talking he said 310WHP is like the uppermost limit a S14 turbo can make and around 350WHP is the uppermost limit a S15 turbo can make. 250WHP is not weak if you consider it comes stock with 155HP at the CRANK. It's all relative, if you want a 350WHP car, more power to you. Just be prepared to spend a bit of money. You'll need turbo upgrade, bigger injectors, maf, ecu, probably cams, valves + springs along with the usual, intake, dp, exhaust, fmic, fuel pump. But in anycase, happy shopping and good luck with your car.

[pushnlacs]

yea it will coast a bit in the end but it will be worth it i dont even want 350whp i just want like 330-340 so i have a good old 400 at the crank, so i have a mean mo fo everytime summer rolls around. i mean to me if you mod a car it better be running at least low 12's high 11's i just hate hearing how people put all this and all that into their car and then still only run 13's. 13's are good a starting point not a finished pruduct(imo)

any way yea 200 for labor is cheap. but im thinking ill just get the car do the swap with the basic mods witch should put me in the 250hp range and id have a low 14 high 13 second car to cruise in, whitch is better than most cameros or stangs. then i could work on suspension brakes and all that then go back to work on the engine.

[Phax]

If you get 250 to the wheels, are you definitely going to want to get the suspension and brakes sorted out. If you are building a project cars, odds are that you are going to have AT LEAST 100,000 miles on the chassis. 250rwhp will push the stock suspension and brakes to their limit.

[pushnlacs]

it wont have 250 at the wheel when i first get the swap done. i meant 250 at the crank, 205 stock plus upped boost fmic and exhaust would bring it to like 250 at the crank when the swaps first done. then ill work on suspension/brakes and all that then go back to the engine for the 340whp goal i have.

[Onizuka]

yea see i dont really want a weak little 250hp ride, i want a mean mo fo. so that when summer time comes round i can have some fun but i think the gt25/35 turbo will do the job phase2 said 340whp or so will be produced using it and full boost will be befor 3500rpm, thats bout the same *** the s15 turbo!! hell yea. phse 2 sound bout the best shop to deal with, enjuku is cool but phase2 said labor for everything needed on a 340whp sr will only be $200 and touge well i dont know about because its a known fact that you cant get 330whp out of a s14 turbo and they said you can.

Well its posible to get 330 out of a S14 turbo, it will just cost way more money than you want to spend.

The GT25 and 35 turbo dont compare to the S15 DBB T28 in spool. I get boost by 1900-2000 rpms and full boost by 2750-3000. That said, I would probably sacrifice some of that low end boost response for higher top-end power.

[pushnlacs]

every shop i talked to said the t28 will max out at 300 310whp at the most and phase2 said it hits full boost at 3600 rmp or so same as the hks gt25/30

[Onizuka]

Well then they arent counting bottom end modification. With higher compression, stroking out to 2.2liters and some tuning it would be a peice of cake to have 320-350 super responsive horsepower. Like I said, its posible but it will cost more money than you want to spend.

I have a T28 with a turbo manifold and 3 inch turbo back. I have the electronic boost controller set really agressivly and I get full boost (only 8 psi in my case, spikes to 8.4) by 3000rpms. The higher the boost the longer it takes for the compressor wheel to get up to speed.

[pushnlacs]

so your saying the t28 could get 340whp if you stroke the engine out to 2.2l and do all that stuff?? what would be the point the if the hks gt25/30 will give you that power with the same response ans the t28??

[Onizuka]

A bigger turbo wont give you better response, but higher compression and cubic centimeters will along with the extra power. It all depends on the package your going after.

[pushnlacs]

im not trying to act lik i know cause im new to turbos. im just going by what phase2motortrend said. they said the stock s13 t25 hits full boost at 3200rpm and that the s15 t28 hits full boost a couple hundred rpm sooner than the hks gt-rs witch boosts at 3800-4000 and they said if i want 330-350whp with quickest response to go with the hks 25/35 witch will give me around 340whp and hit full boost before 3500rpm.

i figured the reason it could give this power with the same response as the stock t28 is beacause it is a aftermarket dual bb turbo designed to produce that power and spool fast and thats why it cost 2000g's

[Onizuka]

What phase2 is saying is right, all im saying is there are several ways to skin the cat. I still say that given that the HKS turbo is bigger, and both the HKS and S15 turbos are dual ball bearing, the S15 turbo will spool faster and have better response in theory, but have a lower peak power. Individual results always vary because everyones setup is different.

I fully support P2's suggestion, kick *** turbo and should be loads of fun to drive. Let us know how it goes

[pushnlacs]

for sure, ill let you know how it goes but the project wont start till next spring/early summer. got to save some money and no point on dealing with it in the winter.