The Camshaft Mega-Thread!

[mcdade240sx]

Let me make sure you know exactly what I'm talking about with the lsd. I have a '92 240, a '96 240 and a lsd from a '90 300zx. The '92 diff, i plan to take out of, is now a parts car for my other '92. When I take out the '92's diff, I can then take the diffs from their housings and swap them and then put the now converted '92 lsd onto the '96 240?

[zenkisilvia]

So the guts from the 300zx diff r going into the s13 housing and then your putting the s13 housing in the s14 chasis, right? that will work you just have to use the s14 rear diff cover on the s13 diff so it will bolt up into the s14!!!! Do u have the whole 300zx diff or just the guts?????

[mcdade240sx]

the whole diff, but it doen't bolt right up. Bolt offsets on the flanges are different

[zenkisilvia]

You need the 5bolt axles to make it work . You can use non turbo 300zx, j30 infinity, Jdm skyline r32,r33, 180sx , s13 silvia ,or s14 silvia axles!!

[mcdade240sx]

I can't just either replace the flanges or do a swap? If not, why not?

[DrifterProdigy85]

No offense but lets keep this thread about Cams and not Diffs and Turbos unless it relates to what cams to choose. Please make a new thread.

[zenkisilvia]

If you swap the internals on the diff its gonna have to be shimmed to sit perfectly in the new housing, and everything has to be lined up precisely in order for it to work correctly or you could really mess somthing up thats why i say take it to a shop that can do it, but you might want to check to see how much money they charge to do it !!!! It might be cheaper to just get the correct axles!!

[mcdade240sx]

thank you and sorry drifterprodigy

[zenkisilvia]

Thats a good point , depending on what diff you have it will have a bearing on how the cams perform in the engine short geared diffs will let u get to your power alot quicker than longer geared ones !!! thats why i have to advance my 264 intake cam using a j30 diff..

[mcdade240sx]

touche

[DrifterProdigy85]

Ill probably go with 272 Cams and a 4.363 R&P eventually.

[DrifterProdigy85]

Heres my car with the Brian Crower 264 Cams. GT2871R .86 @ 16psi. Perfectly flat torque curve.

[WestCo Justin]

No dyno numbers yet since the motor is on the way to Garage Works in Palmdale for machine work starting this weekend, but this is what we have in store...

Tomei 256 in/260 ex for response and decent spoolTomei valve springsTomei cam gears

Tuning will be done via Power FC or AEM EMS w/Tomei 740cc injectors. Planned turbine is GT2871R .64 A/R.

This is all going in The Nismo Shop's S13 drift car. Once I get everything together and the car on a dyno Ill post up results

[blackieblack]

does bc have cams available yet? they sold out.

[DrifterProdigy85]

Im now switching my setup to Tomei Solid Lifters and Tomei Solid Type 270 Cams. Should make a pretty fat powerband being able to rev out to 9krpm.

[zanilth]

Heres my car with the Brian Crower 264 Cams. GT2871R .86 @ 16psi. Perfectly flat torque curve.

Hmm, so if I am understanding everything that I have been reading, if you were to put a 256i/264e setup, your power would be there faster than in this current setup, but wouldn't be as high overall?

Basically, I am looking to run about 350 hp, but I want a nice powerband. Say I would be looking for the gt2871r .64 trim snail, which cams would I go for to get around where I want to be?

Would I need to change the springs and such for that? I am trying to get the information before I start, so I know what I need to learn how to do before I start the project lol.

[DrifterProdigy85]

Youll just have more torque in the midrange while spool up occurs. With the 2871R .86, its always gonna be laggy, making 18-20psi around 4500rpm. Its always best to match the cams with what the turbo is gonna do, cause face it, a 2.0L engine isnt gonna make power unless the turbo is involved. My graph just looks like late power because i had a broken exhaust manifold and the dyno pull was started at 3krpm instead of 2500rpm like most others. If you want more low/mid range power, go with a turbo thats gonna give it and not try to compensate by cams cause its just gonna hurt the performance in the end.

[zanilth]

Youll just have more torque in the midrange while spool up occurs. With the 2871R .86, its always gonna be laggy, making 18-20psi around 4500rpm. Its always best to match the cams with what the turbo is gonna do, cause face it, a 2.0L engine isnt gonna make power unless the turbo is involved. My graph just looks like late power because i had a broken exhaust manifold and the dyno pull was started at 3krpm instead of 2500rpm like most others. If you want more low/mid range power, go with a turbo thats gonna give it and not try to compensate by cams cause its just gonna hurt the performance in the end.

Basically, I am looking for about 350 hp, with a decent power curve...Someone said try the 2871R .63, with cams and a tune, would get me there about 3800 rpm. Any clue what I would get with the .63 trim, and the 256i/264e? Or would it be better overall to go with both 264?

[DrifterProdigy85]

Research turbos a little more. 2871R comes in different trim and A/R sizes. The common used on the SR is the 2871R .64 or .86 A/R which is a 56 trim. The 2871R GT-RS is a 52 Trim which comes in a .64 or .86 A/R also. Both of the .64 and .86 turbos are a T2 turbine housing which bolts to the stock manifold. You can get a T3 Turbine Housing which is .63 or .82 for a custom setup. The T3 .63 is gonna be equivalent to the T2 .86 version but the T3 housing will give better exhaust flow for quicker spool and response. Comes at a price of the custom manifold and downpipe. I believe if you used the 2871R .64 w. 256/264 cam setup and JWT or Enthalpy tune then your gonna be around 350whp with 300+tq to go with it. The 256/264 setup will give a little more torque during spool up which would be good for drifting. A straight 264 setup is gonna give just solid gains from when the 2871R hits full boost to 7000rpm. Both setups are good but i think the 256/264 setup is good for better turbo response while the 264 setup would be better for a pure solid midrange powerband. Both will give 350whp with the 2871R.

[shady240]

alright guys, i need help. im ordering my SR tomorrow and im gonna build it up before i swap it in. Id like to make a race/drift setup at/around 500hp and i got everything picked out except for turbo, cams, and cam gears. can anyone give me a direction to head towards? i read that 264/264 cams were good for such an application but thats it. lil help?

[blackieblack]

god. i want solid lifters too. ^ pick ur turbo out first. then cams and etc. also 500 hp may be a bit much for drift. especially starting out. that is if your just learning. and you need to build the motor top to bottom. and get some a real nice suspension setup and very well tuned anlong with frame reinforcement. lots of work buddy.

[shady240]

well suspension i already have. Tein Superdrift adjustable. im thinkin i should back it down abit tho... then the usual strut bars. im getting power braces and anti sway bars whenever i order them

[STR8E180]

thanks for the advice so far what do you guys think about the 264 int 272 exh idea? im a newb when it comes to cams but i think i will go with hks...

i know this is a late reply BUT i only just joined up so stiff ****

HKS dont make 272 cam's

ur getting ur specs mixed up

hks make the 264 BUT tomei make 270 272 is only made for the GTR engine

[DrifterProdigy85]

HKS does make Step 2 and Step 3 272 cams for intake and exhaust for the SR20DET engines. Engine builders and lots and lots of people have been using them for years. http://www.hksusa.com/info/?id=2081

[sevret.t]

Ok i have been debating this for almost a month now, BC 264 W/ the BC Springs.. OR, HKS 264/272 Step 2 Cams.. Im running a GT2871R not sure if its .63 or not, ill find out today, but im looking for 350-400rwhp.. in 4-6 months i will be getting a PnP job on the head and a 3 angle valve job, also will pick up a Neukin Topmount mani and GReddy Intake Mani.. wanted cams i could possibly keep for both setups.. leaning towards HKS cause they sound awesome and ive seen good power gains from them, but i know bc is also very good and i can get the cams and springs for what i pay for cams only for hks.. whats ya'lls opinions, plz help, thanks in advance fellas

[safin]

cams and turbo go hand in hand and will really give you power where you need it (drag, drit, etc )

this thread has been really helpful, what about for street usage occassional drag. would the gt2871R .86 with 264/272 be too much? too aggressive maybe? killer on gas?

[DrifterProdigy85]

Im gonna be running Tomei 270's with the 2871R .86. Might kill the low end but gains in the top end are gonna be awesome. As far as BC Cams, there good but i think HKS, Tomei, or JWT has there cams really dialed in. The strongest my car ran was with HKS 264 Step 1 Cams.

[idahotuner]

450hp and drifting isnt needed plus good luck finding good boost response for that kind of power. Your best bet is the 2871R .64 with HKS 264 Step 2 Cams. Probably be around 375whp with 20psi around 3600-3800rpm. Youll also be able to run mid 11's on drag radials.

this helps me out alot because this is hwat i am aiming for. but do you need any other head work besides cams for these results???

[hungryjoseph]

anyone here running 256/264 on a s14 sr with stock turbo? what about a 256/256 for the stock turbo s14 sr? i'm looking for real results, but i guess estimates would be cool too. i'm already getting a full spool up of 12psi at 2800rpm with stock manifold, but with 256/256 bump my powerband up? will i see gains in peak hp? what about torque curves? will i spool even quicker with either of these cam setups? what kind of power should i expect with the p&p and 3angle vj, 256/256 or 256/264, stock t28? with your normal bolt ons... stock exhaust mani though.

[usncorpsman]

ok... im gonna be running a greddy intake manifold and a fullrace top mount with a gt3076r...so...will HKS 272/272 work pretty good?