thats a dang good price for that....Originally posted by 86atc250r@Jun 1 2004, 09:12 AM
The 40 off the CRF is the way to go -- it's cheaper than the aftermarket 39 & is already setup for this engine.
Mine was a very easy install & out of the box was jetted better for my HRC kit than the jets that came with the HRC setup for my stock carb.
Power seems way up - especially throttle response & bottom end. It'll be interesting to see what it did to my 300' drag times next weekend --- but even if it didn't affect the quad at the strip (doubtful), it's worth it for the improvement in throttle response.
Overall the quad's power feels much more crisp, it starts even easier (I think the HRC setup was a touch lean on the pilot), and just overall runs great.
I have approx $415 in my FCR conversion.
Are you running the tps or did you just eliminate it? I'm a do-it-yourselfer also so i might have to ask you a couple of questions about it. Does it matter what year carb you get for it? Thanks!Originally posted by 86atc250r@Jun 1 2004, 10:12 AM
The 40 off the CRF is the way to go -- it's cheaper than the aftermarket 39 & is already setup for this engine.
Mine was a very easy install & out of the box was jetted better for my HRC kit than the jets that came with the HRC setup for my stock carb.
Power seems way up - especially throttle response & bottom end. It'll be interesting to see what it did to my 300' drag times next weekend --- but even if it didn't affect the quad at the strip (doubtful), it's worth it for the improvement in throttle response.
Overall the quad's power feels much more crisp, it starts even easier (I think the HRC setup was a touch lean on the pilot), and just overall runs great.
I have approx $415 in my FCR conversion.
He's right about flow and remember the FCR is a better carb. The FCR is a race carb where the stock one is not! B)40mm vs 42mm - the 40mm FCR does not have any obstructions in the air path like the stock carb. Power feels up everywhere, especially in throttle response.[/b]
nevermind...I was just confused...Originally posted by 86atc250r@Jun 7 2004, 12:30 AM
Holeshot -- I'll have the quad at the strip this coming Saturday & I'll know then if it improved my times at all.
Currently I typically run about 5.3 ET (not figuring in any RT). 6.0 flat is a typical total time with R/T figured in. We typically run the pro tree and ET vs RT changes basically on how you stage, shallow or deep (shallow increases RT, but decreases ET and vice versa). 6.0 total time is pretty typical though - so if I can break into the 5's (total time) then it made a positive difference on drag acceleration (I know for a fact that it made a great improvement everywhere else).
40mm vs 42mm - the 40mm FCR does not have any obstructions in the air path like the stock carb. Power feels up everywhere, especially in throttle response.
TPS - throttle position sensor. This allows the quad to have a 3D timing map. As you open the throttle toward full, the ignition timing decreases. This allows increased timing advance under lighter engine loads which improves part throttle power and overall throttle response.
On a quad like the 400ex that doesn't have a TPS - ignition advance has to be run with "worst case" in mind - i.e. full throttle (since the CDI has no feedback to know throttle position or engine load)- so you end up running decreased full throttle advance at all times.