HSR 42mm Carbs
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- Roadster Newby
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Re: HSR 42mm Carbs
Yes, No issue at all...
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Re: HSR 42mm Carbs
What are the jets that you have installed:
Pilot Jet
Needle Jet
Jet Needle
Main jet
what is your altitude
is this a fresh built engine with any mods,
Thanks for the pic, looks fantastic
Pilot Jet
Needle Jet
Jet Needle
Main jet
what is your altitude
is this a fresh built engine with any mods,
Thanks for the pic, looks fantastic
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Re: HSR 42mm Carbs
Are those spacer blocks in between intake and carbs?
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Re: HSR 42mm Carbs
Yes to clear the steering shaft
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Re: HSR 42mm Carbs
What jest do you have installed?
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Re: HSR 42mm Carbs
Correction: what Jets do you have installed
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Re: HSR 42mm Carbs
Got the HSR from Vintage Performance with all jet pre set no issue on hi altitude, here is a more detail image
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Re: HSR 42mm Carbs
I was just curious as to what jets you have in them, I got the same kit from vintage performance and had to totally re-jet, what is you altitude?
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Re: HSR 42mm Carbs
Is your engine rebuilt? if so, is it all still stock or did you build it up a bit?
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Re: HSR 42mm Carbs
Altitude is 2 m
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Re: HSR 42mm Carbs
Engine is stock...
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Re: HSR 42mm Carbs
Do you remember what
pilot jet
needle jet
jet needle (and what slot)
and main jet
that are installed in yours?
pilot jet
needle jet
jet needle (and what slot)
and main jet
that are installed in yours?
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Re: HSR 42mm Carbs
I've have to check is was long ago when I install the carbs...are you having problem with your??
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Re: HSR 42mm Carbs
A bit of a hesitation, but I also had to order other jets, Its running ok, but also think that part of that could be from an old worn out engine, also I have a 123dist. I installed as well,
But I was really curious as to what jets were in yours
But I was really curious as to what jets were in yours
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Re: HSR 42mm Carbs
These are NOT off the shelf bolt on carbs. Imperative to install an O2 sensor for tuning carbs. (How I found out my SU's were leaning out w/ new NOS M39 needles) Need to make sure valve adjustment was correct. Then timing. Then carbs. The timing curve on my 123 was a bit modified from JT's stock settings but not much. I was having the same problem jumping on the accelerator from a downshift causing a carb backfire. I solved it with rejetting and jet needle height adjustment. Here is what I wound up with and my car is now a completely different car....YOU will have to find your own numbers for your car. This is just what I wound up with.
Main 190
Needle and seat 2.3
Needle jet Y-8
Jet needle 95
May seem complicated but not too bad. Waaay better than SU voodoo for me. I can have them off and back on in minutes and would estimate a 25% power increase. My head is a NOS iron head which I was convinced needed porting, but I got them to work without having to "drive around" the backfire. NO further issues and they sound awesome as well. I can just imagine what a stroker with these carbs would be like. My next project! Cheers!!
Main 190
Needle and seat 2.3
Needle jet Y-8
Jet needle 95
May seem complicated but not too bad. Waaay better than SU voodoo for me. I can have them off and back on in minutes and would estimate a 25% power increase. My head is a NOS iron head which I was convinced needed porting, but I got them to work without having to "drive around" the backfire. NO further issues and they sound awesome as well. I can just imagine what a stroker with these carbs would be like. My next project! Cheers!!
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I haven't felt like that since 7th grade...
70 SPL
83 F-250 460 c.i. puller
couple of others
70 SPL
83 F-250 460 c.i. puller
couple of others