how much boost
Originally Posted by CarolinaWS6
I Have a 408 iron block with 9:2:1 compression how much boost do u think i can run with 93 octane i was thinking 10 to 12 but im not sure
It all depends on your intercooler choice. The more heat you can shed from the IC's, the more boost you can run. Also, a cold air intake will help by about 3-7 degrees, but it's your intercooler(s) that make the day, as long as they have good air flowthrough.
This advice is for pump gas. If you are going to run race gas, then multiply your boost by a rough 1.3.
That's a very nice looking car. I have never seen a white one I like as much as yours.
Jim
This advice is for pump gas. If you are going to run race gas, then multiply your boost by a rough 1.3.
That's a very nice looking car. I have never seen a white one I like as much as yours.
Jim
It all depends on your set-up. Fuel pumps, injector size, intercooler efficiency, and the tune all play a major role in boost levels. If the above items are all in check, 16 psi would be a safe level with the parts you have. Bob
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*note Without Methanol or race gas, "I" would limit the boost to 10-11 psi.
With proper fuel/methanol, 15-17psi should be easy. Sell that FAST manifold and buy a 3-4 drums of racegas with the money...
Ryan
With proper fuel/methanol, 15-17psi should be easy. Sell that FAST manifold and buy a 3-4 drums of racegas with the money...
Ryan
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From: Charlotte, NC
thanks guys im just looking to make over 700rwhp on 93 octane and running 9s with full street trim i will eventual have a 116 tune and im undeside on weather or not im going to run methanol
Originally Posted by CarolinaWS6
is it not safely do able on 93?
The new setup at 8.0:1 will be around 15psi on the street for reference. (no meth, pump gas, huge FMIC)
I have been talking with a few turbo shops the last two days about this subject. They all have talked me out of an intercooler and instead going with methanol injection. Were I live it can get up to 115 ambient in the summer. An intercooler will most likely only get the air dwon to 30 above the ambient, 20 if your lucky (so they say). Even with 20, you add that to 115 ambient you still have 135 degree intake air. Thats is a problem I think.
I do not know exacly how cold you can make it with methonal, but I know you can get it well below ambient air.
The hotter the air, the less timing you can run to control detination issues, the less power you can make.
I do not know exacly how cold you can make it with methonal, but I know you can get it well below ambient air.
The hotter the air, the less timing you can run to control detination issues, the less power you can make.
If you skip the intercooler, and want to drive a lot, you may need to pull a trailer full of meth. The IC is great fulltime for low/mid/high boost, with the meth helping out on the high boost runs. 20-30 above ambient is not an awful thing for a motor.
Just my .02.
Jim
Just my .02.
Jim
Why would it use that much methanol? I am not trying to flame, just trying to understand. Most say you can run up to 4 or 5 psi without any cooling. If that is the case then on normal driving you should not be using any methanol. The kit I am looking at, you can set the methanol to start injection at a boost pressure of your choice. So you can set it for higher boost then normal driving. This should limit the amount of methanol used right? Or am I missing something?
I think most people around here will agree that its better safe than sorry. An methanol pump can fail at anytime, run out of meth, clog nozzle, etc. Nothing like that can happen to an intercooler setup. The best thing to do is run both on high boost and you can just use the intercooler at low boost. Many a motor have been lost do to a meth kit failing.
700rwhp should not be a problem on pump gas/ Turbo setup/408ci. With a decent intercooler and enough fuel. You should be able to hit that mark with 10-12lbs of boost and conservative tune.You don't need Methenol.