shano_logz

should i go twin 425 gas carbies or should i fork out the $$$ for gas research or any other way to get good performance? cheers

cruzyhz

i had the gra twin system on my old prem it was a pain in the arse to get someone who can tune them they need to be tuned on a chasis dyno and by someone that knows the system once set up though no problems at all one advantage is that you can plumb cold air induction without chopping the bonnet(twin three inch pipes and pod filters mounted infront of the radiator) contrary to other peoples experiences it stayed tuned all summer long only needing to get tuned again for winter so twice a yr isnt as bad as they say if your chasing out right power they are the only was to go otherwise the cheaper stuff works just fine
my 2 cents worth

383hq

I'm happy with the twin GRA setup.
I've used them NA and blown (25000kms NA, only 9000kms blown)
I don't have any problems with tuners, there's at least four within an hour of me here in Vic.
Check the GRA website for the manuals on how to tune them.
I can't speak for the twin 425's, but previous gas setups were a PITA compared to the GRA.

The only problem I have had is that I've twice had to "Degum" the B2 convertors.

Cheers
Julian

390caddy

I have just gone straight gas on my caddy and used a mixer that sits on the original rochester carby.It goes fine and was a low cost fit. If you want performance and a great looking system I would recomend looking into the technocarb setup. I have seen the settup at Torque gas at Caloundraand it looks great.They are using this system and reckon they have tried almost every system out there over the years. Another member 400hponlpg(I think) seems to know a lot about gas and technocarbs.