Stroker Jetting

[lokar]

Basically I am trying to dial in my main jets right now and I am already up to 380's and still lean. I am wondering about what size main jest do you guys usually end up with on this kind of set-up. Also, is it worth getting bigger carbs at this point seeing as I have no porting or radical compression, or are the stockers substantial.

 

 

My basic setup is 4mm strocker crank, rad valves, dynojet kit, cool head with stock dome size, fmf fatty's w/turbine core II's, dynaFS cdi box, msd coil, and pro design intake filter inside factory box with lid no snorkle. There is no porting, just chamfered edges from a rebuild. Oh, .02 over pistons if it matters. This setup is to be run in east tennessee, cant remember the elevation.

 

Thanks for the help

kevin

[wayfst]

your stock carbs are only good up to 280-300 with the stock needle. a little more with after market needles, right now you could put 500 and it would still be lean. Get some larger carbs and you'll be ok. on another note, i thought dyna's wouldn't work with after market coils. how long have you ran the two together?

[Banchetta]

your stock carbs are only good up to 280-300 with the stock needle. a little more with after market needles, right now you could put 500 and it would still be lean.

Edited December 1, 2005 by Banchetta

[Banchetta]

Basically I am trying to dial in my main jets right now and I am already up to 380's and still lean. I am wondering about what size main jest do you guys usually end up with on this kind of set-up. Also, is it worth getting bigger carbs at this point seeing as I have no porting or radical compression, or are the stockers substantial.

My basic setup is 4mm strocker crank, rad valves, dynojet kit, cool head with stock dome size, fmf fatty's w/turbine core II's, dynaFS cdi box, msd coil, and pro design intake filter inside factory box with lid no snorkle. There is no porting, just chamfered edges from a rebuild. Oh, .02 over pistons if it matters. This setup is to be run in east tennessee, cant remember the elevation.

 

Thanks for the help

kevin

443348[/snapback]

My jetting w/ my 4 mil, stock carbs, mx port, 165psi, w/ Pt mids was 380 mains, needle 5th clip, and stock pilots. I had a pretty good gain, more on the bottom than the top w/ larger carbs. The larger the carb, the better the gains. The 35's yeilded 5 more hp on the bottom and 2hp on top...I'd have to say your jetting should be getting close. Post a pic of your plug after a wot run in 6th gear for 5-10 seconds.

[wayfst]

I wouldn't keep advising people that

443389[/snapback]

why----is the stock carb fairy going to come and get me or-----did he just do that right now?

[Banchetta]

why----is the stock carb fairy going to come and get me or-----did he just do that right now?

443408[/snapback]

It just makes you sound like you don't know what your talking about. The needle will not restrict a 380 main at all.

[wayfst]

You are telling me that a stock carb with a stock needle will move a 380 jet worth of fuel!?

[Banchetta]

You are telling me that a stock carb with a stock needle will move a 380 jet worth of fuel!?

443418[/snapback]

When I first put the stroker together I was running 320 mains in my stock carbs on a dyno, before I reached 6th gear, my pipes started smoking (due to the powdercoat melting off), take into consideration I ran these pipes for 3 years w/ this powercoating. We shut her down before I melted a piston. Threw some 380's in there and ran her. No more smoking, got a good run and tried other sizes seeing gains and loses w/ different sizes from 350-400. So, to answer your question, yes a stock carb will move that much fuel by the stock needle.

[wayfst]

ok, everytime I had to go over 270 with a stock carb on any banshee it would end up like this poor guy here who started this thread. so I say this, lets have lokar go get 400's throw them in-hold it open for 1/4 mile- if it floods out I'll pay for the jets-if it burns down you pay for the jets. what do'ya say lokar?! what the hell does lokar mean anyway?

[Banchetta]

ok, everytime I had to go over 270 with a stock carb on any banshee it would end up like this poor guy here who started this thread.  so I say this, lets have lokar go get 400's throw them in-hold it open for 1/4 mile- if it floods out I'll pay for the jets-if it burns down you pay for the jets. what do'ya say lokar?!  what the hell does lokar mean anyway? 

443439[/snapback]

you lost me.

[wayfst]

I think I lost myself

I was looking on the net, the only powder coating that would take that kind of heat is called stove-bright high temp powder and it's good to 1200 degrees. If I was to hold it open long enough to smoke that stuff I'm sure I would have destoyed something. some people have all the luck.

[Banchetta]

I think I lost myself 

I was looking on the net, the only powder coating that would take that kind of heat is called stove-bright high temp powder and it's good to 1200 degrees. If I was to hold it open long enough to smoke that stuff I'm sure I would have destoyed something. some people have all the luck.

443456[/snapback]

The 1200 degree powdercoat works great, but only comes black....you can use 400 temp, and get any color you want, but it melt off on the first 8 inches of the pipes. The rest will look nice though... When it started smoking, it was the whole header pipe!!! Luckily there was no motor damage...

[wayfst]

cool, I'm out'a here.

[lokar]

Thanks for the help guys. Cat fighting aside, I actually messed up when I wrote this thread. I just gapped the 360's and am getting ready to run the 380's. I will let you guys know in the morning how it goes. I will def. post some pics of the plug.

If it help settle the arguement, im not running the stock needle, I have the dynojet kit installed.

As for lokar, thats the name of my company. We manufacture aftermarket parts for street rods, trucks, muscle cars, etc.

 

And as for the question about the dynaFS and aftermarket coil. I had the coil installed before I bought the dyna, so I went ahead and used it. (I read where they said not to, but I think its just one of those things to cover their butts) Anyway, I ran it for probably 3-4 hard trips in the woods. Hopefully everything will be okay. From the description of why not to do it, I think the worse thing to happen is you dont gain anything from using the coil?

 

So all in all I take it that its not a problem to get it running good with the stock carbs, so I will keep going with the jetting. But I still wonder how much benefit I will get from running bigger carbs.

 

thanks

kevin

[wayfst]

Well there was no " arguement" or "cat fight", thanks for making us sound like a couple of girls, we where just discussing a differing experience with stock carbs. I live at 4000 feet and couldn't get mine to go rich after having it ported. I still say the needle jet on stock carbs are to small for you aplacation, but it's simple to test, put the biggest frick'n jet you can get your hands on-big enough that you're sure that it will fall on its face coughing and sputtering-put it in and if it acts like it does right now I'm right and Banchetta owes me a beer. If it sputters and dies, Banchetta send me your paypal info and I'll buy the beer (just one, I'll just blame it on your luck). so go get a 580 and prove me right!