Ignition advance per compression and boost?
Ignition advance per compression and boost? So right now I'm at a conservative as hell 16 degree peak advance at 11 PSI
Where should I be at 22 PSI with 8.45:1 compression? Did I pick too big a dish when I built my 402? -25CC
Where should I be at 22 PSI with 8.45:1 compression? Did I pick too big a dish when I built my 402? -25CC
With only 11psi, I would be running 30 degrees timing!
Btw, How much power am I likely to gain moving from 16 degree to 22 degree peak advance assuming there is no detonation. (with 8.45:1 and race gas Im sure there won't be at 22PSI)
One way to determine that is to put the car on the dyno and just raise the timing until you don't make anymore power or until you pick up knock on the sensor or see it in the plugs. The better way is to read plugs at the track.
There are way too many variables to just give you a number. The head design and valve angle, the cam (DCR), plugs, weight of the vehicle, amount of restriction in the exhaust, etc. No 2 cars are exactly the same.
There are way too many variables to just give you a number. The head design and valve angle, the cam (DCR), plugs, weight of the vehicle, amount of restriction in the exhaust, etc. No 2 cars are exactly the same.
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Verdad Gallardo Well he's probly making 600ish rwhp with his 11psi and 14? degs timing...and with 22-24 psi and 22-24degs timing he should put down around 850 rwhp and I know this from experience. Now that turbo, with a really good kit/combo, should put down about 950rwhp and a full racing set-up close or over a 1000rwhp max.... so if he has a good kit...turn up the boost, and really....if your going to 22psi just max it out cause it most likely go over 25psi b4 it's done.... Also he needs that timing turn UP to 22-24deg at full boost with c16/q16 and he will be nothing but smiles.....
When I put a 4"DP and Charge Pipe and the PT3000 A2W intercooler on, I expect Ill gain a fair amount over the current 580RWHP (naturally) and then I can raise boost and add timing. Would like to see that 88 max out 
Wonder what the car is going to run when I pull 100lbs, put on skinnies, have a quicker ramp up on the timing, and 500 more rwhp from the 10.80s it runs now, thinking a low 9 when it's all said and done for the PT88. That would be very smiley indeed, just trying to figure out where to set my goals.
Wonder what the car is going to run when I pull 100lbs, put on skinnies, have a quicker ramp up on the timing, and 500 more rwhp from the 10.80s it runs now, thinking a low 9 when it's all said and done for the PT88. That would be very smiley indeed, just trying to figure out where to set my goals. When I put a 4"DP and Charge Pipe and the PT3000 A2W intercooler on, I expect Ill gain a fair amount over the current 580RWHP (naturally) and then I can raise boost and add timing. Would like to see that 88 max out Wonder what the car is going to run when I pull 100lbs, put on skinnies, have a quicker ramp up on the timing, and 500 more rwhp from the 10.80s it runs now, thinking a low 9 when it's all said and done for the PT88. That would be very smiley indeed, just trying to figure out where to set my goals.
Wonder what the car is going to run when I pull 100lbs, put on skinnies, have a quicker ramp up on the timing, and 500 more rwhp from the 10.80s it runs now, thinking a low 9 when it's all said and done for the PT88. That would be very smiley indeed, just trying to figure out where to set my goals.
TECH Resident
Joined: Aug 2008
Posts: 910
Likes: 0
From: Dubai
Only time and the dyno will tell! I'll be back from Iraq in 2 months, so in 3 months I should be done zapping and screwing it all back together. Btw saw one of you is from Dubai, how much does a car like mine, if it was mildly streetable, nicely modified and ran low 9s be worth over there?
TECH Resident
Joined: Aug 2008
Posts: 910
Likes: 0
From: Dubai
Only time and the dyno will tell! I'll be back from Iraq in 2 months, so in 3 months I should be done zapping and screwing it all back together. Btw saw one of you is from Dubai, how much does a car like mine, if it was mildly streetable, nicely modified and ran low 9s be worth over there?
PM me, and who knows what comes up
Oh crap, Well when I picked my heads, they were still so new nobody knew the fatigue point of them. Now they do, and I guess I'm a little late to find out, L92 heads dont hold up to turbo boost very well! ... Looks like low 9s even will be out the window as Ill have to keep the power down to around 850 RWHP to have any sort of margin of safety on this thing. So the question now is, what's safer, more boost less timing? or less boost more timing? if either put you at your same goal? which creates lower peak pressure?
Wouldnt you think more timing and lower boost would be optimal? Im thinking at an effieciency standpoint. I guess it just depends on the setup.Sorry im full of questions and no help lol
