It dun broked......

[Ct.TOPGUN]

Got Romeo's on mine. But you guys seem to like to play with marginal fuel octane. that scares me. I octane way up after my last failure lifting a head.


Jim

[DolSVT00]

Originally Posted by Ct.TOPGUN

Got Romeo's on mine. But you guys seem to like to play with marginal fuel octane. that scares me. I octane way up after my last failure lifting a head.


Jim

We keep the timing down and run them rich for that, we also shift them early to keep the rpm's down.

Mine wasn't octane related, the rest of the cyl's were clean and the timing marks on the plugs looked good too.

When were running them on pump gas, were running an 11.0 AF and 6* of timing max at the end of the run. Thats why they don't MPH, they just 60' the ramp is reversed till 3400rpm, out the hole were running 14-16 to 3400 then 6* every gear after.

[bambooi]

Originally Posted by DolSVT00

We keep the timing down and run them rich for that, we also shift them early to keep the rpm's down.

Mine wasn't octane related, the rest of the cyl's were clean and the timing marks on the plugs looked good too.

When were running them on pump gas, were running an 11.0 AF and 6* of timing max at the end of the run. Thats why they don't MPH, they just 60' the ramp is reversed till 3400rpm, out the hole were running 14-16 to 3400 then 6* every gear after.

Is that considered a lot of timing at peak torque? I see the timing at the higher rpms is low but a peak that seems high. On my evo, I had only a couple degrees at peak torque and about 11 at 7k rpms on 93. Of course my ride was a little 4 banger, but I'm just curious and trying to learn.

[DolSVT00]

Originally Posted by bambooi

Is that considered a lot of timing at peak torque? I see the timing at the higher rpms is low but a peak that seems high. On my evo, I had only a couple degrees at peak torque and about 11 at 7k rpms on 93. Of course my ride was a little 4 banger, but I'm just curious and trying to learn.

No, a race setup is 19-20* even at 6400 with good fuel.

On ours, you can push more tq if you come out with more timing, thats why we cut 1.4-1.5 60's in a 4800lb truck on pump gas, considering we stall to around 2k we only see high timing for the first 60 feet at low RPM's.