Sounds like a challenge . . . . now . . . :Zip2: . . . and . . . :Track: ! ! !
NO BALLS . . . . then post the video and ET's here for all to see !!
Oh and about running me...bring it! We can do it at the track or on the street from a roll. Doesn't matter to me.
8psi on one motor isn't the same as 8psi on another motor. Boost is a show of restriction and nothing else. So if your car breathes better than my car then 8psi on your gauge is more positive pressure than 8psi on my gauge. Understand how that works?
Oh and about running me...bring it! We can do it at the track or on the street from a roll. Doesn't matter to me.
That throttle response you speak of comes at a cost….the loss of throttle modulation. The larger the throttle body, the less modulation you will have. When going too big, you’ll run into tip in issues where a very small amount of throttle amounts to a huge swing in the change of airflow into the engine. While this may be fine in a track only car, the loss of modulation can be a pita on a daily driver.
For your basic H/C/I car (stock displacement), a 65mm or 70mm TB is fine.
That is indeed true but I have a Summit Racing 75mm TB on my Stang (basic bolt-ons plus DIY ported factory heads/intake) and throttle modulation on tip in isn't an issue. I just ported the opening of the upper intake to match the 75mm bore. No problem. I also have the C&L 76mm MAF kit
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Correct again but if you decide to take the stroker route (331 or 347) later on, you might wish you bought the 75mm TB right from the outset.
I agree totally with what he told you and think you are doing a wise choice.
For the people that do not want to buy things first here is the absolute best advice for anyone that even has a chance they might go 331/347 later but justs wants a H/C/I right now.
Go with a 75mm TB. It will drive fine and give you the absolute best performance possible on a H/C/I 302 especially if you plan to rev it high.
Notch the pistons!!! This is a very simple and easy thing to do so that you can run bigger heads now and more camshaft so you can take advantage of the 6,000+rpms.
Buy heads that you can grow into. I did the mistake of buying AFR 165s. They did fine on my 302 but when I wanted to go stroker they would be the heads that will hold me back so I've spent money twice. Some awsome heads that you can grow into are a set of Twisted Wedge heads or AFR 185s.
A good cheap MAF that will fit well with the 4" powerpipe is a lightning 90mm maf. Again you cannot hurt performance with a larger MAF and this will keep you from buying another MAF later when you go to stroke your motor or simply add more power. You can search on Ebay and find this MAF all day and night for $70 and some change.
So for anyone that doesn't wanna take other people's advice and spend your money twice, listen to someone that has spent their money twice and use their mistakes instead of yours. :nice
Let's see, throw on a 4.00" intake piping, and have a 75 mm TB (~3.00") on it so you do not have a restriction?
If you want to match the intake, throw on a 100 mm TB.
Yeah, makes sense.
Some guys get swindled by salesmen easier than others.
Actually I said a 75mm RACE Accufab TB. And I'm sure YOU know but for others that aren't as smart as YOU are I will explain the difference between a race one and a non race one. The race series Accufab TBs bell out to a 90mm. So at the open where you match it up to the 4" intake pipe it is 90mm. Then it goes down to a 75mm at the blade. So you have the driveability of the 75mm TB but a nice bell that will make the 4" to 75mm a good transacting.
But ofcourse a smart guy such as yourself already knew all of this.
Alright, I will play your game for a little while longer.
Who's dyno graph is that? Your's or AFM's? Any more detail on that?
Who is to say that a 3.50" pipe would not do the same?
So again, why have a 75 mm TB (opening or minimum area), on a 101.6 mm pipe? What good is the pipe going to do?
I have been wanting an answer for a few post now.
The air will be much cooler from the power pipe and placing the MAF in the fender will also make more power. AND AGAIN this intake will allow you to upgrade later and it will still make power. If you or anyone else would like more indepth information here you should call AFM and talk to either Rick or Brian about this. Both great guys to deal with.
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