 |
PM |  | |
Quote | | |
Reply | | |
Full Topic | |
| Joined: | 03-17-2005 |
| Location: | Warmond, Netherlands |
| Posts: | 216 |
| Status: |
Offline
|
I agree with Judson:
if you are not thinking of using your JH for the track but as a hot streetable car, then i think BHP is less important then torque. You would want a fat torque curve that gives you lots of power from 2000 rpm till 6000 rpm.
I mean in a 30 year old convertible..who dares going faster than 200 km/hour? Also peak BHP is mostly around 6500/7200 rpm, but on the street you hardly live in those rpm ranges..at least i don't. Same goes for peak torque; you would want the peak torque at 5500 rpm or even lower than that.
Judson's engine sounds very good and torquey. 11:1 c/r on gas pump is indeed very good. Judson; i would love to know your peak BHP and peak torque.
My new 2.2L engine build by Garry Kemp is also 11:1 c/r on gas pump. That is a great basis to work on. (my pistons are JE's). Now comes head, cams, carbs etc..
the dyno plot Judson referred to has a peak power of 220 BHP at 7246 rpm and a peak torque of 171.1 lb ft at 6232 rpm. This is a 2.2L engine with 10.9:1 c/r and 104 on both inlet AND exhaust. This is a great example: with the 104's on inlet and exhaust you loose low end torque.
My engine uses a 107 cam on the inlet and a custom cam (similar to the 104) for the exhaust (i would have to ask Garry for the specs). My engine has a peak power of 210 BHP at 6250 rpm (peak power is much lower!!) and a peak torque of 178 lb ft at........5000 rpm!! (more torque at a much lower rpm). It has 135 lb ft at 2500 rpm!
the stock JH (with dellortos) has peak torque of 140 lb ft at 5500 rpm.
I run 45E dellortos and they have been rejetted by Garry with 38mm venturis. I used to run 2.0L with 2 x 107 cams and 45E with 36 venturis.
It all comes down to your driving style and purpose. In the much congested little country i live, i won't be able to drive much faster than 170 km/hr and i don't think if i could i would considering the respectable age and design of the car.
Does anyone know how the JH performes when driving on or over 130mph??
good luck in your choices
erik harkes
Last edited on 09-05-2005 10:04 am by Harkes