Research for my build Sr20det

[R-Yahne_240]

EAGLE RODS SR20DET CRS5365N3D ARP BOLTSCP PISTONS AND RINGS 86.5MM NISSAN SR20DET 8.5:1 SC7327 ARP MAIN STUD KIT NISSAN SR20DET 202-5402 240sxBrian Crower Stage 2 264/264 Cams for Nissan 240sx / Silvia (SR20DET only)(Part No: BC0201)BrianCrower_DB0200Brian Crower Titanium Valve Springs and Retainer Kit for SR20DET

im looking at building this car for drifting and drag

now before you flame me i have 2 rear end set up that im gonna run

soo just for the motor build heres a few of the parts im looking at buying i have the money just looking for experiance with the parts

im also gonna use a greddy intake manifold greddy fmic custom exhaust manifold

the turbo is still unknown right now either a gt35r or a gt3071r

______more questions stock crank 86mm stroke how much will that crank hold before popping

i want 450whp do-able with this set up??????

open to anyone with knowledge

[R-Yahne_240]

cosmetic headgasketp&p head 3'' full exhaust

[CMG]

cosmetic headgasketp&p head 3'' full exhaust

Yes, cosmetic headgaskets are essential, they make your engine look so pretty.

[R-Yahne_240]

Bump

[redtop91]

Your original post is almost completely illegible. The stock crank will take anything you can throw at it and beg for more. And I'm pretty sure you mean 86mm bore rather than stroke.

[R-Yahne_240]

first how is it illegible

and the bore is 86.5mm hint the pistons im using

i heard that the crank was bulletproof but i was not sure if it had a rpm limit

the whole bottom end will be balanced as a unit

[Hijacker]

Nissan does a great job balancing engine internals. I've seen many pistons melt, a few rods thrown, but never a crank cracked.

For 450 WHP, you could just skip the eagle rods and save yourself money. The stock rods will hold 450 fine. most stock SRs get destroyed over the 400 limit because of melted pistons due to bad tuning (too much boost and not enough fuel). The eagle rods would be good insurance, but the stockers would work fine, and if you wanted to be absolutely certain, get them cryo-ed and peened. Also if you get ARP rod bolts for the stock rods, you'll have to have a shop recondition anyways because the ARP bolts put the bearing race out of circle.

the RPM limit in an SR is not in the bottom end, it's in the top end. The HLA setup that Nissan used is a big handicap as the rocker arms are noted to fly off or crack after about 7500 rpms. Also valve float becomes an issue at that point, especially with a set of upgrade cams on stock springs (which you remedied with the springs and retainers). Solid rocker pivots are essential to helping make the head rev well.

A well built SR head will allow you to rev up high with little worry, but I would only consider it insurance as opposed to "hellz yeah! 9k shifts!"

What are you using as a clutch and flywheel? They need to be balanced with the bottom end since they're part of the rotating assembly.

[ILikeMy240sx]

cometic HG is terrible.

Go with Apexi or Tomei

[redtop91]

but the stockers would work fine, and if you wanted to be absolutely certain, get them cryo-ed and peened. Also if you get ARP rod bolts for the stock rods, you'll have to have a shop recondition anyways because the ARP bolts put the bearing race out of circle.

Indeed. Enjuku sells some rods that go through that exact treatment for cheap. Might want to look into it.

[Hijacker]

cometic HG is terrible.

Go with Apexi or Tomei

I have never had trouble with cometic. I see most of the people who have leaky cometics don't take the time to get their heads checked and decked, nor the block.

[R-Yahne_240]

well ill be decking the block with the build also

fidianza 11lbs

exedy stage 3

yeahh i know the head limits the revs with this set up 9k shifts ???

at what rpm would be pushing this springs and valve assembly

[idahotuner]

cometic HG is terrible.

Go with Apexi or Tomei

i took his advice.

and this is pretty close to my build which i havent started for my head. i not really planing on huge revs. 7.5k ot 7.7k is fine with me

[R-Yahne_240]

i took his advice.

and this is pretty close to my build which i havent started for my head. i not really planing on huge revs. 7.5k ot 7.7k is fine with me

you took his advice before you built your motor???

how do you know the cosmetic hg is a rip??? any experance i have 3 buddys with stock sr20 motors head studs and a cosmetic hg and 18 psi from the t25 and there fine

thats why i was gonna get it

but im doing my research

[idahotuner]

if you did you research you would find a thread disscusing head gaskets. started by yours truly.....

zerothread?id=278948

and i took his advice in buying my HG...

Have you seen the threads ILOVEMY240SX has post pretty smart guy if you asked me lol.

http://www.nicoclub.com/articles.php?id=238409

here is the one about building the head to rev to 9000+ PRMS

[redtop91]

how do you know the cosmetic hg is a rip??? any experance i have 3 buddys with stock sr20 motors head studs and a cosmetic hg and 18 psi from the t25 and there fine

ROFL! The T25 can't flow enough to even strain the stock headgasket much less any aftermarket. I'm pretty certain you phrased that wrong but for the record taking 18 PSI from a T25 is absolutely no testiment to a headgasket's quality.

[DrifterProdigy85]

For drifting, id say not to use a turbo larger than GT3071R .63 (T3) or GT2871R .64 (T2). Anything larger is gonna be laggy and unresponsive. Also id stick with Stock Intake Manifold so you can have more mid range tq. The mid range tq is whats gonna get those wheels spinning, once there spinning gearing and rpm will keep them spinning. Keeping that in mind a good set of cams would be any 256 or 264 setup. As far as headgasket goes, go Apexi. Its got metal rings that seal the cylinders which gives little to no chance of blowing out. There have been a number of people blow Cometics. Also how high are you revving? Hydraulic Lifters are good to 8krpm with the BC Springs. Go Solid Lifters and rev to 8500rpm with the BC Springs or 9000+rpm with Double Valve Springs.

[TheKon]

The previous owner of my SR motor had a cometic HG...and he had a leak from it...(hence why I have to put it back together)...I tossed that thing in the trash and I'm going to get my self a nice HKS or Tomei head gasket. yeah it's $200 but it's money well spent. When you see there's almost $100 between the price of two items...usually it's a safe bet that the cheaper item is junk and I personally haven't had a good experience with Cometic...considering...my 240sx isn't running...

[R-Yahne_240]

yeahh ill probably go apexi hg

but im still updecided about the turbo

with the 8.5:1 pistons how much boost to make 450whp on these turbos

gt3071r

or

gt3582r

remember 450whp i want the least boost with the most power

im using bc 264 cams

[DrifterProdigy85]

GT35R is gonna take around 16-18psi to reach 450whp. The only problem with that is, there will be **** for torque below 5krpm. GT3071R is much better but would need around 20-22psi to make 450whp. The good thing about it though is its fast spool. Youll hit 20+psi around 4200rpm which will give you the torque needed for drifting.

[R-Yahne_240]

see thats what im looking at now

bc 16psi is alot diffrent that 22psi

i think before i buy the turbo i'll decide if i do want to build it for drifting and drag

bc a gt35r at 22 psi 525whp??????

[DrifterProdigy85]

Your starting to come off as one of those kids that want to make a drift car but have no f*cking idea what there talking about. I can guarantee you wont be able to drift the GT35 on a SR20. The motor will have zero power below 5krpm and that doesnt even account for the time it takes to spool the turbo in between throttle transition. For drifting you need immidiate power from 4krpm and up. The GT35R at 4krpm only gives the SR around 150tq. Good luck spinning the tires with that. The GT3071R is gonna give 300+tq @ 4krpm. Also understand that tq makes hp. GT35R @ 4krpm will make 114hp. GT3071R @ 4krpm will make 228hp. Equation is TQ x RPM/5252 = HP.

[R-Yahne_240]

thats why im trying to build a 1/4 mile track car but i want to throw a diffrent reat end in it ang go drifting i know the hp conversion with tq and all that mess there is no drift events near hear and the ones that started just got shut down sooo yeah drag is the build im looking for DrifterProdigy85 so im looking for a motor set up right now

the turbo size is all the diffrence in a drag car im looking at running sport rwd and throw a diff sub cradle in it and practice drifting im really just looking to build a streetable drag car

450whp is still streetable

[chicos240]

Yahne, Dude.Your posts are hard to read because of the lack of punctuation and basic grammar. We want to help. But not all of us have time to decipher reading what you typed when you are really just typing what you are thinking. There is a difference. Plus it makes it easier for people to search for terms and exact typings when we all ask questions using whole words and decent grammar. Thanks

It sounds like you want to build a track car that you can also use as a drift car when you have time to move some parts around. I would suggest building a good suspension, then a strong motor that is reliable, this means good quality parts, such as tomei and brian crower to name a few. Read the 9000 RPM thread.Maybe buy the new Sr20det DVD.Read the cams thread.We are here to help, but make it easy for us to help you.

[DrifterProdigy85]

GT30R Twin Scroll is my suggestion. Youll be over 450whp @ 18psi and the boost response wont be too horrible to try and drift with. My SR is strickly drag use. For a drag motor, i suggest you send it to Mazworx. Mark definitly knows what hes doing there. I'll be using a T67 with 50 shot for midrange power. But like you said, drift and drag are totally different setups.

[Dugi]

for 450whp I would go with the GT3076R. with 0.63 AR turbine

I have just finished building my engine with same specs has you mentioned

CP pistons 8.5:1 86.5 boreeagle rodsBC 264 camsBC spring&retainer kitGT3076R

I dynoed 378whp @15psi but running 10.8 afrso if i leaned it to about 11.6 I would see 400whp. rev limit was also set @ 7200rpm just to be safe at the momentso there is enough hp to gain with the same boost

I will be posting a topic of my built motor soon when i'm finished completely

Douglasand this was on pump gas

[R-Yahne_240]

ok to clarify

Im looking to build a streetable Track car that will be well performing in the areas of drag racing and drifting

as a motor i am using a sr20det black top out of the 97 180sx type x with 34,xxx miles on it

for the shell of the car i just bought a 90 xe hatchback

EAGLE RODS ARP BOLTSCP PISTONS AND RINGS 86.5MM 8.5:1 ARP MAIN STUD KIT NISSAN SR20DET Brian Crower Stage 2 264/264 Brian Crower Titanium Valve Springs and RetainersApexi Head GasketPorted and Polished HeadCustom Top Mount T3 Turbo ManifoldGreddy FMIC Greddy RS BOVExedy Stage 3 Street/Strip ClutchFidanza 11LBS Flywheel

Stock Intake manifold for now

Im looking to make around 450whp with this set up using a GT3071R turbo @18-20 psi

I have been researching that turbo for about 6 weeks and it seems to fit the need of which i'm looking for it to do

Also any suggestions on a fuel system and engine management

right now im researching greddy e-manage ultimate and apexi power fc

Fuel system??????

i appreciate any imput

[DrifterProdigy85]

PFC L Jetro. 740cc Injectors. You should look into Twin Scroll turbo setups. You gain 30tq throughout the entire powerband over the normal single scroll.

[R-Yahne_240]

twin scroll set up never heard of it

i'll look into that thanks

i already have 740 injectors

back to the research boards lol

[spider_slayer]

Im looking to build a streetable Track car that will be well performing in the areas of drag racing and drifting

here is your problem.

for the most part; you can't have your cake and eat it too.

[R-Yahne_240]

well i dont think that is having your cake and eating it to

its like icing on the cake 450whp is still streetable