liong story short i purchased this car for a killer price car runs and drives great, untill i hit about 7500rpm at full throttle it starts breaking up really bad. it free revs no problems at all, i immediatly check for boost leaks, coupler blow offs etc. oil pressure on the guage is still good, checked/changed plugs... needless to say im lost and looking for help before i send it to a shop and get whacked big time. heres a breakdown of the set up. thanks

Engine:

-B16 Short Block Built By Darton ERL
-Fully Balanced & Blue-Printed
-84mm Darton Sleeves
-Crower Billet Rods
-CP Pistons
-Billet Oil Pump
-Moroso 5.5 qt Oil Pan With Windage Tray
-B16 Head
-Crower Turbo Cams
-Port and Polished 3 Angle Valve Job
-Cometic Head Gasket
-ARP Head Studs
-Edelbrock Victor X Intake
-Edelbrock 65mm Throttle Body
-Fluidampr Crank Balancer SFI Approved
-Fluidyne Radiator

Turbo System:

-GT35R Garrett Turbo
-California Jay Top Mount Manifold
-Tial 44mm Wastegate
-Tial 50mm Blow Off Valve
-Peakboost Bar and Plate Intercooler

Electronics:

-AEM EMS
-AEM UEGO
-Innovative MSBC Dual Solenoid Set up
-Greddy Turbo Timer
-Autometer Tach., Oil Press., Oil Temp.
Water Temp., Fuel Level

Drivetrain:

-4 Puck Sprung Competition Clutch
-Quaife Limited Slip
-1000 HP Driveshaft Shop Axles

Fuel System:

-Aeromotive A1000 Fuel Pump
-Aeromotive Fuel Pressure Regulator
-Billet Inline Fuel Filters
-Golden Eagle Fuel Rail
-Precision 1000cc Injectors
-16 Gallon Fuel Cell
-Earls -10an Braided Fuel Feed Line
-Earls -8an Braided Fuel Return Line
-NX Nitrous System
-Custom Moroso Sprial Flow Exhaust

 

it may just need to be "fine" tuned

 

i spoke with pro function automotive the shop who did the pump gas tune. they said that its the ignition system. the car is running stock distributor with ngk wires, i know local guys making well over 350 on stock distrubutors. the tune file looks great ill try to upload that later today

 

hmmmmm.. sounds like your having the same problem me and another guy is having on this forum.. i think we may need either a distributor, tune, or we have a boost leak

 

Stock distributor and ngk wires are fine. You made need to add an MSD 6A or something along those lines and you'll be fine for 500+. What plugs are you running, what are they gapped to and how much boost are you running?

 

plugs and gap?

 

Wasn't sure exactly what he meant by "breaking up." I thought my car was "breaking up" on the dyno but the spark was being blown out by too much boost. I gapped the plugs from 24 to 16 and it fixed my problem. I was just throwing out an idea why the car would be having a hard time at high rpm (if he was running high boost). A long shot, but just a thought

 

16 is way to small of a gap. You want the biggest gap you can run while not blowing the flame out. I wouldnt go any lower then 24 on anything unless your just running a stupid big turbo with tons of boost. 24 should have been plenty you run up to 30 pounds of boost. 16 is just plain stupid, cause that right there can cause a piston to melt. Sounds like your tuner needs a few lessons in the fine are of tunning. Also make sure your running NGK and not anything else

 

ngk plugs for sure factory gaped @ .22. not sure the number i know there 2 steps colder. im gonna try a msd external coil and cap to see if that changes anything. thanks alot keep the suggestions coming

 

ignition related or boost cut....

 

this happened to me in the past..2 times..2 different issues.

1st car, breaking up at 7500, car was a stock 94 gsr dizzy, with a external coil, we trashed that setup and put a NEW dist. King dist. on there..no more issues.

2nd car, 10:1 pistons on 15psi, blowing spark out..ran NGK v powers for a ITR ('7s')

gapped to 26 thou from the 43 they came in, fixed that car.

 

so its breaking up at 7500 or before then at wot?

 

breaking up at 7500 while @ OT if that makes sense

 

car has a brand new oem distrubtor on it. less than 6 months old

 

I'm not sure, I'm running 28psi on E85... The plugs were standard ngks (I believe 24) and they were being blown out. How can the small gap melt a piston? Not to thread jack but anyone else care to comment how small you can gap your plugs?

As far as the tuner, he built the first hondas in colorado to run 12's 11's 10's and 9's. Remember this car? He built and drives it... I think he knows what he's doing