Chris Etemadi

Im starting to get my BLM's close to 128, I am still not getting the performance increase I was expecting, I ran a 13.6 @ 103 last night and I know I have more in it than that. I was thinking about starting to put more timing into it. Im still with the stock iron L98's ported , and we polished the combustion chamber, and now I have 10.5:1 compression, Would a higher compression motor require more timing to create the most horspower? sorry for the questions, but I am at a loss, Im very dissapointed in how my car is running and Im trying to find the problem, alot of my friends are now wanting me to put a carb on it, and I REALLY dont want to do that to get the most out of the motor, especially when I know i can do the same with fuel injection, im just missing somthing here.
thanks fory our help,
Chris

John Millican

iTrader: (1)

Mid 13's is respectable for an engine with stock heads. You have the right cam for that intake but to me it's the heads which are holding you back.
Also iron heads and 10.5 compression is pushing it with pump gas, unless you're using race gas. More timing is the last thing you want with your combo. Maybe you have too much and the computer is pulling it back to adjust due to knock. You won't even hear the knock unless it's really alot since the computer can pull MANY degrees out automaticly. Have you hooked up a scan tool to see what's happening?

Chris Etemadi

yea i have hooked it up and I received no knock counts, The heads are ported out pretty good and I have 2.02 1.60 valves in there I would hope they could flow something close to LT1 heads do stock, and LT1's with similar mods as me are running mid 12's
I actually have base timing bumped to 9 degrees instead of factory 6 and I still am getting no knock counts. I know there has to be something holding me back

John Millican

iTrader: (1)

What was your 60' times?

Chris Etemadi

2.091 (bald street tires)

John Millican

iTrader: (1)

Chris, have you touched the spark tables in your chip at all or are they still stock?

Chris Etemadi

well I advanced the distributer 2 degrees more than stock (8) so therefore the whole table got 2 extra degrees, and I corrected the MAT table for relocating the MAT to my air box so. Other than that Im using the stock AUJP bin

John Millican

iTrader: (1)

Chris you have mail.

John Millican

iTrader: (1)

Chris, my e-mail bounced back to me. E-mail me and I'll reply again.

kevm14

Using the stock tables with a CC305? You need to bring your total max timing in sooner. Instead of a smooth rampup of 100kpa timing, it should hit the value it would have hit at, say, 5500, at an earlier rpm, such as 3000 or 3500, then stay the same until your max rpm. That should help the midrange and hopefully get the trap speed up and ET down...

Chris Etemadi

John, I sent you my new email. Sorry about that.