Jerry -
The very first thing I'd check for is slop and maladjustment of the
throttle linkage. If you are only getting a max 3/4ths-4/5ths
throttle or something like that due to bad adjustment of the linkage,
the difference in power would be VERY apparent. I know from personal
experience on this.
Alan
On 7/8/11, Jerry Costanzo <grumpyinloomis@ssctv.net> wrote:
> I have two Healeys, one is a BN4 with a 3000 engine, HD8 carbs and a 4.1
> differential. The other is a BJ8 with a 3000 engine , HD8 carbs and a 3.9
> differential. I built both engines. The BN4 is 30 over and the BJ8 is
> stock.
> The BN4 head has been slightly ported, not on the BJ8. The BJ8 has headers.
> Driving he BN4 today gives me the impression that it has more horsepower. I
> was on the freeway and if you step on it, it will accelerate away. I still
> donb t feel that on the BJ8. It accelerates, but nothing like the earlier
> car.
> Is it the rear end difference or did my slight porting (clean up of the
> ports
> for the most part) make that much difference? The only other thing I donb t
> know is the cam profile on the BN4. The car was raced before I got it and
> the
> machine shop said it was still in good shape so I put it in the engine.
>
> Opinions?
>
> Jerry
> BN4
> BJ8
> _______________________________________________
> Healeys@autox.team.net
> Donate: http://www.team.net/donate.html
> Suggested annual donation $12.75
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/healeys/healey.nut@gmail.com
>
--
Sent from my mobile device
_______________________________________________
Healeys@autox.team.net
Donate: http://www.team.net/donate.html
Suggested annual donation $12.75
Archive: http://www.team.net/archive
Forums: http://www.team.net/forums
|