@GomerP posted:hi everyone, its been a few months since last post but i do spend some time each day reading up on what going on in the group.
I had the opportunity to get my speedster on a chassis dyno a couple of weeks back. And wanted to get some feedback on the data. Car runs very well but i am curious if what steps you might recommend to get a bit more Torque out of the existing engine.
Engine specs as i know them....
1915cc as supplied from VS back in 2010.
94 mm X 69
1.11 Rockers
I do not know what cam is installed.
Tri mill Hot Dog exhaust (with heater boxes)
New Weber IDF 40s (jetted using a wideband and a lot of road time.) Replaced the Empi 34s. that came on the car. by the way this had a significant improvement above 4k. rpm
Stock heads no porting.
Results were about what i expected.
Max power = 67whp @ 3980 rpm Average power = 58whp. Based on typical calculations this would be about 85-90bhp (at the crank).
Max Torque = 97.5 @ 3360 rpm Average Torque = 70
AF Ratio is pretty flat at 12-12.2 up to about 4800 then drops to around 11.
sorry for the crappy screen shot.
@GomerP posted:Oh Al.. now you got me second guessing.
what you noted is kinda what I was initially thinking I would get in the way of feedback.
so the thought process is start with rockers & port work. See if I am satisfied (hahahahah I am never satisfied that’s the point of this hobby) 110 Bhp is kinda what I have in mind for now. And of course I’d kinda like to push this engine a bit even if I do build another monster. I do not know any good shops that I would trust to do port work on my existing heads. If anyone has a recommendation I am all 👂s.
question on rockers. If I am not changing the crank do I need new pushrods. I see a lot of conflicting info on the great inter web... if I go from say the 1.1 to 1.2+
As for the heater boxes unfortunately they must stay if I want SO acceptance/ buy in. She asked asked a lot fewer questions about what I spend when she gets to enjoy the ride.exhaust is another question, I read that the tri mill hot dog I Have starts to be an issue anything north of 90bhp.
recommendations on merged header are welcome.
oh this is going to be fun.. now I want to hop up the 1915 and start a fresh build. Yes y’all are great at spending my $$$$
@Pat Downs Any advice you could offer this gentlemen regarding his desire for more power out of his anemic 1915cc?