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Question about Intercooling and Methanol Inj. in my Supercharged 4.6

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Old 10-22-2009, 02:42 AM   #1
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Default Question about Intercooling and Methanol Inj. in my Supercharged 4.6

i just rebuilt my 4.6 to make about 500rwhp with 10lb of boost from a paxton supercharger.
my question is that ive installed an intercooler AND methanol injection for this build. I thought that having the cooler intake charge from the intercooler and a spray of meth/water during boost would be great for my intake temp but am i overcompensating?
a few of my friends seem to think the methanol kit will be suffice and that the intercooler is just going overboard. any feedback would be awesome..
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Old 10-22-2009, 05:37 AM   #2
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Well honestly on 10psi you will be fine with just an intercooler, the meth wont hurt the combination but its far from necessary but youll probably gain some extra ponies cause you can prob advance the timming a little more with the cooler intake temp.
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Old 10-22-2009, 06:42 AM   #3
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Quote:
Originally Posted by mynamesbryan View Post
i just rebuilt my 4.6 to make about 500rwhp with 10lb of boost from a paxton supercharger.
my question is that ive installed an intercooler AND methanol injection for this build. I thought that having the cooler intake charge from the intercooler and a spray of meth/water during boost would be great for my intake temp but am i overcompensating?
a few of my friends seem to think the methanol kit will be suffice and that the intercooler is just going overboard. any feedback would be awesome..
Hey man, I recently had the Novi 2000 installed in my car, after blowing the stock engine after about 20,000 miles with it installed. I now have a Cobra shortblock, manley rods, SLP forged pistons and a cobra crank. I am not intercooled and I too am at 10 psi, making 417 rwhp. I will be watching this thread to see how you make out. How much hp are you making right now at 10 psi??
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Old 10-22-2009, 08:52 AM   #4
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Quote:
Originally Posted by mynamesbryan View Post
i just rebuilt my 4.6 to make about 500rwhp with 10lb of boost from a paxton supercharger.
my question is that ive installed an intercooler AND methanol injection for this build. I thought that having the cooler intake charge from the intercooler and a spray of meth/water during boost would be great for my intake temp but am i overcompensating?
a few of my friends seem to think the methanol kit will be suffice and that the intercooler is just going overboard. any feedback would be awesome..
Hate to break it to you but 4V Cobras have quite a hard time getting to 500RWHP with their stock eaton. At 10 PSI on that blower you wont even be neighbors with 500RWHP, meth injected or not.

It definitely won't be overkill, you can never be safe enough. As long as your willing to throw the cash at it and have it tuned correctly theres nothing wrong with spraying meth on that setup. As was said before it will free up some timing for your tune. But you won't be getting 500RWHP. Especially not @ 10 PSI.
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Old 10-22-2009, 09:56 AM   #5
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Yeah try more like an on edge tune and 16-17 lbs
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Old 10-22-2009, 01:06 PM   #6
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Hate to break it to you but 4V Cobras have quite a hard time getting to 500RWHP with their stock eaton. At 10 PSI on that blower you wont even be neighbors with 500RWHP, meth injected or not.

It definitely won't be overkill, you can never be safe enough. As long as your willing to throw the cash at it and have it tuned correctly theres nothing wrong with spraying meth on that setup. As was said before it will free up some timing for your tune. But you won't be getting 500RWHP. Especially not @ 10 PSI.
where did the cobra bit come from?
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Old 10-22-2009, 01:24 PM   #7
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where did the cobra bit come from?
It was just a comparison, I was putting it in prospective for him.

If the 4V equivalent of your engine can't come close to 500RWHP with a pullied PD blower. How are you gonna make your 2V @ 10 PSI even close to 500rwhp?
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Old 10-22-2009, 01:39 PM   #8
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Boost will set you free. I'd say 13-15psi should do it. As far as intercooling and meth injection, all you need is a good intercooler. I run 9psi intercooled and my engine runs cool.. I've literally never had the temperature gauge at 50%.. she always runs at about 30-40% up.

Anyways, cooling shouldn't be an issue until you're around 600rwhp (this is what I've read from MM & FF magazine)... then you'd probably need a high performance radiator.
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Old 10-22-2009, 02:00 PM   #9
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you really wont need meth to get to 500rw... The intercooler alone will be fine.
BTW, it'll take ~ 13-14 PSI to get to 500rw. Depending on the engine setup of course. Do you have ported heads,cams,ect..?? Fuel system to support this? What about your tranny? rear end?
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Old 10-22-2009, 02:04 PM   #10
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Keep the intercooler. You can run the methanol if you want, so have had success.........I did not. I sold mine. I bought the intercooler and it has been awesome.
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Old 10-22-2009, 02:36 PM   #11
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Keep the intercooler. You can run the methanol if you want, so have had success.........I did not. I sold mine. I bought the intercooler and it has been awesome.
Same here!!!
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Old 10-22-2009, 02:49 PM   #12
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im looking at intercoolers, which would be best at a reasonable price for my set up?
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Old 10-22-2009, 02:59 PM   #13
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I got the 750hp rated one from MPH (www.modularpowerhouse.com) for pretty cheap. Not cheap like the ebay ones, but not expensive like the paxton. The last dyno, my air-intake temps rose only 4-degrees from ambient at 6600rpm with a 2.85" pulley on.........I couldn't be happier with it's performance. It is a turbo a/a intercooler.

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Old 10-22-2009, 03:13 PM   #14
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Well I got the Ebay unit and zero problems
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Old 10-22-2009, 03:25 PM   #15
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Meth w/o an intercooler is ghetto and asking for trouble. Meth on top of an intercooler for added safety is a good idea imo.
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Old 10-22-2009, 03:35 PM   #16
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Meth w/o an intercooler is ghetto and asking for trouble.
IDK about Ghetto, but yea asking for trouble!
Just meth injection alone is OK but the end result is it will not keep temps down after a few runs. Intercooler is superior in that it keeps temps down and safety wise much better than meth even with the so called meth safety devices.
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Old 10-23-2009, 09:55 PM   #17
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hey guys thanks for all your imput. to answer a few questions i have a 2V. i rebuilt the motor with a .20over bore w/ manley pistons, valve job on intake and exhaust valves, ported heads, stage 2.5 blower cams. iv also installed longtube headers and my transmission is a PA transmission rated to 800rwhp with a torque converter from precision industries rated to 1600 rwhp stalled to 3000. So iv got the support i need for the motor.

The car was at about 360rwhp @ 6lb of boost before i decided to rebuild so with all the work ive done and after a tune from danny swanson im thinkin ill be at around 500rwhp.. but well see.

based on what everyone has said iv decided to keep the intercooler installed for now and keep the methanol injection installed. just to be safe
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Old 10-24-2009, 01:08 AM   #18
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maybe you should retune it at RET, i had my car in at swansons about 2 months ago then i took it to RET and they got 24 more hp out of it and fixed the inconsistant idle.
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Old 10-24-2009, 12:31 PM   #19
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Why does everybody buy built trannys with such low stalls?
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Old 10-24-2009, 01:34 PM   #20
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Quote:
Originally Posted by Hangwire View Post
It was just a comparison, I was putting it in prospective for him.

If the 4V equivalent of your engine can't come close to 500RWHP with a pullied PD blower. How are you gonna make your 2V @ 10 PSI even close to 500rwhp?
well the cobra eaton is terrible. boost is a measurement of restriction in your intake from the cylinders, 10psi on one car doesnt mean another car will make the same power at 10psi. his car is alot different than a stock cobra with 10psi on the heaton.

op, you mentioned everything but rear end. you changed your axles/lsd out yet?
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Old 10-24-2009, 01:34 PM
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