No issues at all, everything works normally, especially if you go with one from Modular Performance. They were the first to be doing the process, but I've read some things about other engine builders out there who's product tends to eat head gaskets. It all has to do with the prep of the deck surface after the resleeve in an effort to have easier machining and lower costs. I don't know if John @ MP wants me letting out his trade secrets.
The only other issue is boost. Don't plan on running more than 16 PSI or so, since the head gaskets are so thin because of the fatter bores. But, then again, you'll make more power with less boost anyhow, so high pressure isn't really needed from the beginning.
Oh, sorry about that. They are actualy Cometic head gaskets, really good pieces. If I recall correctly, typical materials don't survive because there is only 6mm of bore spacing between the cylinders after Modular Performance installs the new sleeves. The gaskets can even be reused once with no worries.
I also have a BB from Modular Performance. I could not be happier with my motor. It is VERY hard to stay off the pedal. Im running 9psi of boost right now, planning on going twin screw race kit from AED to 16psi soon. Im actually going to pulley for 16spi but will see about 14psi on the gauge due to my better flowing motor, so ill be more in the safe zone, but will be making great power. Im even going to top it off with about a 50-75hp shot for those close races.
If your going BB I would go with Modular Performance or Renagade.
All depends on what cams you use and what heads you go with, especially when you choose between SOHC and DOHC. But, for a SOHC, plan on getting 40-60 more RWHP than an identical motor of the standard bore. The shape of the dyno curve stays almost identical, but how much you get depends on a lot of factors.
Renegade Racing Big-Bore, roughly 10.2:1 Compression ratio
Renegade Racing P&P NPI heads
Crower Stg 2 PI SC cams
Plastic PI intake
C&L upper intake
BBK 75mm TB
Big Kooks TBird headers
4200 RPM Stall TC
4.30 TLok Rear-end
There is a few other things if you want all the nitty gritty. You can read about that here. Due note, even though the numbers don't really reflect it, I am pretty sure SAE corrected on a DynoJet, the car would make around 330 RWHP as is.
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