91z28ss

iTrader: (4)

Hey,

my engine was done close to 4 years ago, and we never fined tune it yet...The car is running way too rich at 10.5@2500 for a max of 12.4@5750!
My 30Lbs Svo are too big!? According to Zekes performance tech, a set of 24Lbs should hold up to 400Hp easily (we already know that), but with a good custom chip done by Mr. Ed Wright, there shouldn't be any problem with my 30Lbs SVO... I guess I will have to return the chip with my dyno sheet

I have a 224-230@0.50 duration roller compcam, edelbrock 6085 ported heads, bored 0.20, 10.1 compression, slp 1 3/4 headers with a slp 3"catback without cat, slp dual CAI, 30Lbs SVO, accel superram manifold, runners & plenum, 58mm TB, automatic with a 3:73. I know that my combination would fit better with a stroker with some better heads too but I am really unhappy with these following numbers...


rear wheels 4250 RPM 308.1Lbs Torque
rear wheels 5750 RPM 292 HP

I was doing lot more torque with my SLP runners, siamesed plenum and TPIS manifold with 1 5/8 headers with a ZZ3 camshaft and the same heads.

I guess I will have to try a set of 24LBS injectors to make the engine running lean before I go any further. And then decide if I go stroker this winter to gain the needed 50Lbs torque. When I did my homeworks about the superram combo, I ended up with couple options, but I guess I should be more conservative and stay with the proven 219-219 camshaft, 195 AFR in a 383. But at the end, I will spend the same amount for a LS swap...Argh

Orr89RocZ

iTrader: (20)

IF it aint tuned, injectors arent goin to help. You could run 65lb injectors or 24's and still make same power once its tuned.

Need a chip to make it perform. Air fuel is too rich

91z28ss

iTrader: (4)

Yeah I have a custom chip from Ed Wright! I am checking my MAP sensor and even if there is no check engine it seems to not operate properly: it's sit at 3 volts!?! I need a tech 1 to make further investigation, but at the end, I am running wayyyy too rich. But again you are right, if the custom chip is made for 30's and I put 24's, the computer won't like that and at the end, I will need to send the chip back...

I really tought that this combination would make more HP and more torque

TTOP350

iTrader: (8)

You need to have it tuned locally, if you can..

91z28ss

iTrader: (4)

my good friend is a good tuner but knows nothin about custom chip. He's not good in computer...And even Zekes performance (previously know as SLP in Qc) send all their custom chip to Ed. So we can tune it with the timing, afpr and that's about it. If it wasn't too expensive, I would buy an Accel dfi gen 7

Orr89RocZ

iTrader: (20)

It will once you get it running right. You need to beable to do datalogs and send ED the information to make correct changes.

Doing chip tuning isnt that difficult or expensive. Buy the hardware for under 250 bucks and then you just need access to a laptop and download tunerpro rt.

Street Lethal

iTrader: (16)

What is your base fuel pressure?

355tpipickup

iTrader: (5)

subed for info.

Orr89RocZ

iTrader: (20)

I realize the edelbrock heads are just the performer heads which arent much better than stock heads. How much port work was done? Numbers arent bad for a stock headed motor with that cam but mild porting should pick up closer to 330whp I would have thought.

91z28ss

iTrader: (4)

street lethal: my base fuel pressure is set at 30! minimum I can go I think


Orr89rocz: my heads received a mild porting, gaskets match and a stage 1 porting to smooth the inside and the superram received no porting at all. The intake was already matched to the gaskets, it could use extra polishing but I did not pay attention to this matter since the intake was already flowing much more than I needed with my combination..

I will go with the 383 route with the AFR 195cc heads and go with another camshaft this winter. I will make some extended research on proven superram setup! I invested a lot of money to see some noticeable hp and torque gain in this setup and I want to see some results on the track too. I will be back with my dyno sheet next spring.

Orr89RocZ

iTrader: (20)

Just because the intake flows more on a bench than the heads do, doesnt mean the combination wont respond to port work to the intake. An intake can restrict headflow even if it is advertised to flow more on a flowbench. Stock L98 with stock 200cfm heads picks up alot of power when switching from stock TPI to aftermarket TPI or even stealth rams which flow well in excess of 230 cfm.

The intake and the head is a system and they need to work together. There are times where more intake flow than head flow doesnt help, but doesnt hurt and then again it may depending on the runner shapes. There are times where an intake flows less than a head, but more headflow actually helps make more power! Its funny how it works sometimes.

Impaqt

iTrader: (1)

Why so low?

91z28ss

iTrader: (4)

Impaqt: I had to set it at 30 to decrease the fuel pressure because I am running too rich! But even so, I am still running to rich...

91z28ss

iTrader: (4)

Orr89rocz:

I have checked my current heads flow that was read on the flow bench after the porting job, and they flow 233-175@5000 wich is surely better than stock heads. If I clearly remember, we flowed my previous L98 heads at 174-148@5000!!!

We just made some new test on the car. The vaccuum is at 14, and the block learn is at 100 on the tech 1! wich is very too rich. And when I put manually with a pump the vaccum at 18 in the map, the block learn jump at 126 wich is fine running not too rich not too lean. But, when I give some gas, the engine is hesitating and giving back pressure. Even without the extra vaccum, the engine is hesitating with the open throttle but no back fire?? All the sensors function as they should (map, tps, O2,). And I have no intake leak or exhaust leak.

And as for the 30svo injectors, my tuner says it as nothing to do with my problem, since the software should be able to adjust the pulse for em.

I will call Ed for the chip first thing monday morning. I def will return it, I know for a fact, that couple guys had to re-do the chip more than once after reading some posts on corvette forum.

thegooseman

I gained over 50rwhp with a dyno tune on my new motor. A proper tune is crucial.