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Re: Like feature @Skeans1 - Like feature has been added.
February 14, 2018, 09:01:43 PM
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Re: 1985 take out transmission Holy smokes this all went down in only 4 minutes!
November 23, 2018, 01:33:18 AM
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Re: I did it again I doubt I'll go that big. But since I have frames now I'm willing to cut on. I will be doing a 350rx build
April 18, 2019, 02:45:21 PM
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Re: 330 pro cross cr 250r Yes I am very familiar with the CR330 CP cylinder.  I did a lot of development on that CP cylinder on a 1996 CR 250 lower end around 1996 or 1997.  I had a customer that funded the development on an engine package for outlaw shifter kart application.  We went though a hand full of cylinders, heads and built a lot of test pipes.  The ports and the casting are the same on the TRX 330 cylinder except where the exhaust pipe connects to the exhaust port.  The exhaust pipe plugged in to a socket in the cylinder on the CR 330 version where the TRX 330 had the bolt on flange that the TRX 250R cylinder used. 

We were getting power at the counter shaft in the mid to high 60s on gas and low 70s on alcohol on the OEM CR250 cylinder  The customer wanted more power, so we spent a couple more months developing the 330 top end.  The stock 330 cylinder made mid 40s with the 250 pipes that were on the market at that time. The box stock 1996 CR 250 also made mid 40s with same groups of 250 pipes

We developed the 330 package on gas until we knew we had reached the thermal limit of the thin piston tops when they started to sag at power levels in the high 60s.  We put it on alcohol and continued to develop the engine package.  We reached the thermal limits of the piston top on alcohol when the power level reached the mid 70s. 

In summary:

The customer spent over 20,000.00 to develop the 330cc top end that only made 3 more hp than we could get out of 250cc from the Honda CR 250 OEM cylinder.

September 30, 2020, 11:55:11 PM
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Re: Exhaust Hangers I personally would use speaker wire before I bought anything from bdt, but to each their own...
Loren

May 13, 2022, 02:24:58 PM
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