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Does anybody know how direct scan reads or calculates boost? Every time my buddy takes reading on the street, it all looks good running up to 18 lbs of boost with a Red's 93 chip. @ the track with the boost turned up to 22 lbs with Reds 106 chip & C-16 the boost readings break up. Car also...

I have purchased a roller cam kit from a T.R. owner in my area & on installation, my machinist informed me that @ the proper installed valve spring height, the springs are @ 100# seated pressure. As far as I know hyd. rollers should be @ 140. To shim these to the proper pressure I will be into...

Do my M&A heads need steam holes drilled in them for use on my 4.1 o/c block. I'm sure they do , but wondering why they were not put in by previous owner. They have 1.94/1.60 valves, so they really don't fit on a 3.8 bore without touching the cylinders. I got them off a stock block motor &...

I am wondering if I can use the titanium valves that my heads came with, or if I have to buy S.S. One engine builder says that they are only good to 1400 degrees F. Another says to use them, they are more durable. James

Can anybody tell me what mods have to be done to a production front cover to fit an on center S2 block. It seems to sit .12" out further from the face of the block where the cam & crank sit on the production block. Or do I have to buy a different cover & where could I get one. Also, my stage 2...

Does anybody have any feedback on how much harder it will be to spool two 60-1 P-trim turbos compared to ,lets say aQ-trim 76 or 88. The reason I am asking is that I just purchased a 270ci. stage 11 motor with stage 11 heads & ATR twin turbo headers & I like the headers but combining those heads...