The Sr20/Sr22vet thread

[livelovesole]

At what power level would you guys recommend upgrading to supertech oversized +1 in +2 exh valves on a p12 head? I just sent my p12 head to maxworx to get their stage 0 head work done and was thinking if i should slap on oversized valves. Im aiming for around 500-600hp at around 25-30psi of boost. Head is going to have supertech 93lb dual valve springs amd tomei cam gears, thats pretty much it as far as the head goes.

[candyred_240sx]

Latest tune:



sr22vet, Kelford 184-T cams, GTX35 1.06 A/R @ 35 psi, 70% ethanol.

725whp / 526 tq

[Yellow4g63]

What's choking you up top? Intake manifold? you seem to peak at 7200ish rpm or is the cam timing you are running?

**Fark I need glasses lol it's the turbo maxing out.

[EsChassisLove]

Originally Posted by livelovesole

At what power level would you guys recommend upgrading to supertech oversized +1 in +2 exh valves on a p12 head? I just sent my p12 head to maxworx to get their stage 0 head work done and was thinking if i should slap on oversized valves. Im aiming for around 500-600hp at around 25-30psi of boost. Head is going to have supertech 93lb dual valve springs amd tomei cam gears, thats pretty much it as far as the head goes.

Don't waste the money if you aren't going to max power. You can get your power level easy with oem sized valves.

[RalliartRsX]

Originally Posted by EsChassisLove

Don't waste the money if you aren't going to max power. You can get your power level easy with oem sized valves.

This.

Spend your money on valve seat/valve work. THAT is where the gains are.
The VE head could benefit from opening up the exhaust ports, but unequivocally, where the air actually enters and leaves the engine is where the magic lies.

[livelovesole]

Thanks alot for the help guys.

[PoorMans180SX]

Originally Posted by CrunkGoat

Well my build is slowly getting there and basically just have a few bolt ons left (intake, and a few swap parts.) My major decision now is what ECU to run. The engine is going in an old Datsun 510 and I'm doing a high compression NA build so don't think I need anything too crazy. Was looking at an AEM EMS 4 what's everyone think of that?

Fuck EMS4's. They have trigger and EMF noise issues and are generally poorly constructed. Don't do it. Get an Infiniti at minimum. Better yet an MS3pro and even better still a Link G4+.

[d9m13n]

Anyone know of any off the shelf adapter plates for ign-a1 coils on a p12 head with p12 vc? Or what are people using (I doubt they bolt right on)

[240SXK]

hello after a few people on Instagram told me to post here im @jp_s14 on Instagram I run a S14/P11 ve+t making 532whp at 29psi on 93 octane 9100rpm redline, it is my drift/weekend streetcar with 8200 miles so far, fully built engine 87mm bore on stock sleeves, using an old gt3076r T3, sr16 non n1 cams, id1000cc, aem v2, custom intake manfold using stock runners, modified doc race exhaust manifold, fully built valve train shimless oversize valveswith ported exhaust, and bottom end.. using stock s13 trans Lol, I build engines for a living so if anyone needs a bulletproof vet setup let me know. I am from CT. before anyone says its "dynojet numbers" this dynojet has been calibrated within less of 6hp of what your "mustang" dynos read. ive been on and off both too many times

[RalliartRsX]

JP did you ever figure out your shim issue??

I was the one who posted the FSM shim diagram btw

[240SXK]

Originally Posted by RalliartRsX

JP did you ever figure out your shim issue??

I was the one who posted the FSM shim diagram btw

yeah, by going shimless Lol, thank you!

[RalliartRsX]

I thought the first shimless setup didn't fare too well??

[240SXK]

Originally Posted by RalliartRsX

I thought the first shimless setup didn't fare too well??

I ran into valve float issues with the supertech springs and bent all my exhaust valves so I went with a better spring setup, but the shimless setup was the best thing I could have done to stop spitting shims.

[RalliartRsX]

Aha! So that's what it was

It's a god send those shimless lol

You should put a full scale dyno sheet as the bottom the RPM plot is cutoff

[rbs14kouki]

Originally Posted by d9m13n

Anyone know of any off the shelf adapter plates for ign-a1 coils on a p12 head with p12 vc? Or what are people using (I doubt they bolt right on)

Im running the Taarks adaptor kit to run r35 coilpacks , if that could help

I never saw an plate for the style of coils you plan on running ! Custom it is or maybe look into an other coil set-up

[rbs14kouki]

Originally Posted by RalliartRsX

JP did you ever figure out your shim issue??

I was the one who posted the FSM shim diagram btw

Originally Posted by 240SXK

yeah, by going shimless Lol, thank you!

I know my tuner never had any issue with shims but he's running on the big lob only (he runs in the high 7sec on the 1/4 btw)... i did the same thing on my engin . Its a vvl killer but for a broke mofo like me gahaha

Maybe the problem is when the lobs are switching over

[RalliartRsX]

The problem is simply drifting. The shock on the valve train by banging off the limiter @ 9000+ RPM (JP revs it out to that range) is utterly tremendous! No ammount of shim working would ever really fix that unless one wants to spend cubic amount of $$ to keep shims in place and bang off limiters @ 9000+ RPM

[2_Liter_Turbo]

My question for those who have gone shimless is how long until you have to tear down the head to replace valves because the lash went out of spec? Do VVL heads have a worse likelihood of spitting shims than a solid lifter DET head? I never once spit a shim in the 13 years I've had my DET head (spun up to 9k with solid lifters, but mostly between 8-8.5k), but I'm in the process of switching over to a P11 head now.

[s13silvia123]

Correct me if I'm wrong. The P12 Head uses the same Valve Springs as the H22 head?

[Yellow4g63]

P11 head, the BC springs are the same part #.

[s13silvia123]

Originally Posted by Yellow4g63

P11 head, the BC springs are the same part #.

You're saying its the same part number for p12 as well.

[RalliartRsX]

Originally Posted by s13silvia123

You're saying its the same part number for p12 as well.

What Yellow is saying is the P11 head shares the same springs/part number with the H22.

The P12 is a different animal entirely.

[s13silvia123]

Originally Posted by RalliartRsX

What Yellow is saying is the P11 head shares the same springs/part number with the H22.

The P12 is a different animal entirely.

gotcha Chris

[s13silvia123]

for you guys who are pushing 700hp range. are you guys using -8 AN or -10 AN fuel lines.

[RalliartRsX]

-8AN fuel lines should suffice but folks just step up to -10AN for peace of mind.

Anyone here running Taarks Hall sensor and ECU Master ECU?? Or any other ecu with the taarks hall sensor??

Looking to pick someone's brain on setup.

[EsChassisLove]

So turns out my P12 head is missing two shims. And I cant get new ones for another 6-8 weeks.

Whats this I hear we can run shimless heads? How can I do that because I really doint want to wait 6-8 more weeks. I already waited 8 weeks for custom CP pistons. Im done waiting lol

[Rb26kouki]

Originally Posted by EsChassisLove

So turns out my P12 head is missing two shims. And I cant get new ones for another 6-8 weeks.



Whats this I hear we can run shimless heads? How can I do that because I really doint want to wait 6-8 more weeks. I already waited 8 weeks for custom CP pistons. Im done waiting lol

Mazworx shimless valves 600$ plus a new valve job

[Yellow4g63]

Originally Posted by EsChassisLove

So turns out my P12 head is missing two shims. And I cant get new ones for another 6-8 weeks.

Whats this I hear we can run shimless heads? How can I do that because I really doint want to wait 6-8 more weeks. I already waited 8 weeks for custom CP pistons. Im done waiting lol

are they the same as the P11 head? if so just go down the Harley dealer and get some vrod shims.

[s13silvia123]

Originally Posted by EsChassisLove

So turns out my P12 head is missing two shims. And I cant get new ones for another 6-8 weeks.

Whats this I hear we can run shimless heads? How can I do that because I really doint want to wait 6-8 more weeks. I already waited 8 weeks for custom CP pistons. Im done waiting lol

run the head shimless. this is what i'm doing so the head won't spit them out. but you'll have to run a whole new set up of valves and machine them to clearance

[RalliartRsX]

Originally Posted by EsChassisLove

So turns out my P12 head is missing two shims. And I cant get new ones for another 6-8 weeks.

Whats this I hear we can run shimless heads? How can I do that because I really doint want to wait 6-8 more weeks. I already waited 8 weeks for custom CP pistons. Im done waiting lol

Unless you want to drop another 1000-1200 to properly go shimless buy a set of v rod or 10mm shims.

I have several different sizes here. If you need a few let me know. I'll send them to you