Can anyone advise me on a rough jetting guide for a Kent 1600 running a 32/36 weber. I have only recently assemble the 1600, it is a mild build with 10:1 cr, ported head with standard valves, GT manifold, cam is similar to GT profile, extractors and a free flowing exhaust. As it is it goes well but hesitates slightly when first accelerating. I will get it dyno tuned when run in but the hesitation drives me nuts.
better to work off what you already have jet wise you probably only need go up 05 on each main
At the moment there is a 140 main jet in primary and secondary with 170 and 160 air correction jet. I thought this would be very rich for a 1600 and wouldn't be the cause of the hesitation. The fuel pump is working with a 50 fuel jet.
The ventures are both 35's. I don't recall the emulsion tubes and i think the idle jets are 50 and 55.
I thought this arrangement may have been way off the mark and the main jet is not the cause.
I will get it tuned on a rolling road but want to fix hesitation before.
Is it a 32/36 or a 32DGV? And check venturis because 35 was not used.
Yes, it is a 32/36 but it came in bits. I reassembled it but i had no idea if all the components were original.
Guess you mean the aux venturis are 3.5 .
Yes correct 3.5. I have some spares in a box that are 4.5's i don't now what difference they would make
Aux venturis are "matched" to the rest of the carb so don't change these to 4.5 unless you know what you are doing.
Like Graham said up the main jet of the primary barrel by 0.05 (140 -> 145).
Clean idle jets (these clog up easily) and put the 55 in the primary barrel.
Finally made it to the rolling road for tuning. With a little fiddling the result was 76hp and 121 ft lb torque at the wheels. A bit less than i thought but was a budget build.
I’d say that’s ok factory GT spec was only 84bhp flywheel. Non GT was about 75 fly so your a fair bit up on standard
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I have just re read your initial post and still think you have done ok, given that GT spec already had a performance exhaust extractor you haven’t done a great deal to get the gains you have what it really needs is more cam the gt cam is very mildOriginally Posted by Graham
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The cam only has 215 duration so that would be robbing some power. I went for a milder grind as i didn't want to loose drive ability but may have been to cautious. It runs nice now and torquey for what it is.
Off the topic what do you the maximum hp the pinto efi manifold would flow n/a on a 2.0. My thoughts is it would top out 150-160hp. I have one sitting around and thinking of the next project.
It would easily flow enough air for that power, but a wild enough cam to get that power will give you a really poor idle as wild cams and plenum manifolds give inlet charge robbing issues at idle and very light throttle positions
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Ok that is what i suspected would be the case. I don't want to turbo charge so i think i will stick with plan A which was twin 45's.
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