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Bike TBs on an XE
the_fbi - 20/12/05 at 06:13 PM

I don't suppose anybody has any rolling road graphs of their XE running bike throttle bodies they could post up?

Trying to compare the "locost" approach with Jenvey/SBD/Weber etc.

Can you also detail engine mods, management etc.

Appreciated.
ta
Chris

NS Dev - 21/12/05 at 01:05 PM

I don't I'm afraid, but rolling road graphs won't tell you much, the issue will not be power related, just ease of fitting and eventual cost involved.

Correctly sized bike throttle bodies will make just the same power as equivalent Jenvey's etc.

The art is selecting the right bodies, and most use late Suzuki GSXR jobbies as they are all seperate and can therefore be easily respaced to suit the vauxhall bore centrelines.

the_fbi - 21/12/05 at 01:30 PM

quote:
Originally posted by NS Dev
Correctly sized bike throttle bodies will make just the same power as equivalent Jenvey's etc.

Thats my problem. I'm having a "discussion" with somebody on another forum who is doubting the ability of bike tb's and megasquirt to be in the same ballpark as Jenvey's and MBE/Emerald etc.

Schrodinger - 21/12/05 at 01:38 PM

Just to add another perspective, I have a 1.8 Zetec with TBs made from an old pair of Weber 40s and it produced 150 BHP on Emerald's RR when I had the ECU set up.
The engine was new and had a pair of 2.0l cams and produces what is predicted for this state of tune with Jenvey's

regards

Keith
Suffolk

rusty nuts - 21/12/05 at 02:17 PM

Sorry to hijack thread but Schrodinger do you have any information on how to convert webers to TBs? I'm sure a few people on here would like to see it . Thanks

NS Dev - 21/12/05 at 04:33 PM

quote:
Originally posted by the_fbi
quote:
Originally posted by NS Dev
Correctly sized bike throttle bodies will make just the same power as equivalent Jenvey's etc.

Thats my problem. I'm having a "discussion" with somebody on another forum who is doubting the ability of bike tb's and megasquirt to be in the same ballpark as Jenvey's and MBE/Emerald etc.


Just ignore them!

The lack of knowledge on this subject even at very high levels is truly shocking!!!

I have not used megasquirt, and have suggested to others not to on occasion, but not because it is "worse" or will "not make the right power", but simply because until recently it was more complex to get going with.

I like the emerald system because a complete computer twit like me can still understand it.

In terms of power, there will be no issues at all, so don't worry!

All you need to be concerned about is as follows:

1) can you physically (without having to pay somebody lots of money to do tig welding) connect the bodies to the engine and maintain an effective induction length.

2) can you wire up the injection system and get the engine started

3) can you find a rolling road that will be willing to map the car on megasquirt.

If all 3 answers are yes, then it will work exactly the same as any other system.

There are many people out there with jenveys and mbe ecu's that have never been on a rolling road and consequently will be making less power than a properly set up system.

The question with electronic fuel injection/ign is not what setup you use, but how well set up that system is.