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them ITbB's look baad ass. im not trying to hijack this thread or anything but did u notice any differences after swapping to a bigger throttle body. It seems you know what your doing and can maybe help me understand its benefits. ive been told a few times on r3v and just shooting the breeze with friends that they dont do anything to a m20. Since YOU HAVE ACTUALLY DONE IT how do u like it? I am very interested in getting the larger throttle body for a turbo M20. and did u need an adapter to fit your manifold?lol
if youd like u can PM me back. nice work tho!
Engine is a stroker with Eta crank and rods with i pistons with notched valve reliefs and cut piston skirts. Decked block.
I head ported and polished with Schrick 288 cam with 1mm oversized eccentrics from IE.
Big bore TB. 17.5 injectors. Running on stock motronic 1.3.
Long tube Headers and crappy exhaust... ( lol fern has a double 2.25 from the headers to 2 18" bullet resonators an then a 22" dual in/out magnaflo...)
Trying to get him to change to a single 2.5 with just a borla or vibrant muffler! (do it)!
Im surprised hes making good power with all the mods untuned and having the car lean out after 5,000 rpm. Redline is stock 6,900 .
When MS is tuned and ITB's are on common 7,500rpm sexy time!
Compression is gustimated a 10.1
So compression is higher than normal because block has a mm or 2 off??
So compression is higher than normal because block has a mm or 2 off??
my guess would be that when you add 3mm of crank throw and take 5mm off the rod you are 2mm down the bore. Deck the block to get the piston back to where it was and the CR goes up from nominally 8.8:1 to 9.42:1. A little skim off the head and it goes a bit higher again.
This is the cheapest way to do a pretty good stroker as you get the extra CC, bump in CR and retain the squish. All you need is a hotter cam to help the topend and with the I intake, I electronics, I exhaust and you'll make more power than an I accross the board unlike the other budget strokers which are not worth the effort IMO
89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
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