help tunning my webbers

Webers, Cam selection and Ignition upgrades.

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saigon9mm
Posts: 17
Joined: Tue Jan 07, 2014 10:56 pm

help tunning my webbers

Post by saigon9mm »

I been working on my car an now ready to take it out but cant figure out how to make the webbers not bog on the take off an miss firing a little bit .. I have the 3tc with side draft 45 webbers head was done , headers , an stage 2 cluctch , straight pipe to 2 1/2 exhaust if anybody can help would be great thanks ...
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mallito1.8
Posts: 264
Joined: Sun Jun 23, 2013 3:04 pm
Location: Manchester New Hampshire

Re: help tunning my webbers

Post by mallito1.8 »

saigon9mm wrote:I been working on my car an now ready to take it out but cant figure out how to make the webbers not bog on the take off an miss firing a little bit .. I have the 3tc with side draft 45 webbers head was done , headers , an stage 2 cluctch , straight pipe to 2 1/2 exhaust if anybody can help would be great thanks ...
Cam ? Jet size ? Stock engine ? Ignition system ?
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saigon9mm
Posts: 17
Joined: Tue Jan 07, 2014 10:56 pm

Re: help tunning my webbers

Post by saigon9mm »

As of right now stock everything except head was done but im in the process of buying new ignition , better fuel pump cause is running on stock one .. Forgot to change when working on the motor . An jet size dont know cause i bought the set up real cheap an didnt ask . I know they were running nos with it cause the foggers are in place already ..all i need to get it to cruise right until i do more upgrades . My concern is that it wont run right an have to change set up thanks ..
saigon9mm
Posts: 17
Joined: Tue Jan 07, 2014 10:56 pm

Re: help tunning my webbers

Post by saigon9mm »

I know a lot of people say there too big but im hoping i can make them ok till i do the rest of the upgrades .. Jets are 190 ---145 are they too big ?
KE20Rally
Posts: 15
Joined: Tue Oct 29, 2013 11:42 pm
Location: Perth, Western Australia

Re: help tunning my webbers

Post by KE20Rally »

45's are not too big, with my cam (higher rpm) I need 48's. We need your complete set up, at the very minimum please provide the following:

Choke size:
Emulsion tube:
Main jets:
Main air correctors:
Primary (idle) jets:
Primary correctors:

Once you get me these details I will check it against my tunes and see if it's the tune or another issue.

Cheers,

Pete
saigon9mm
Posts: 17
Joined: Tue Jan 07, 2014 10:56 pm

Re: help tunning my webbers

Post by saigon9mm »

I ll get u those numbers i ll be working on the car tomorow ..thanks
Toyota1515
Posts: 784
Joined: Fri Aug 09, 2013 2:59 am

Re: help tunning my webbers

Post by Toyota1515 »

Every engine is different and in different places cars are at different altitudes so the same engine will not work with the same setup equally in every place with that said, i suggest you to install em synchronize them and go with the ol trick of reading spark plugs, or go with a wide band reader/gauge to tune em the perfect way, they will perform good right after you tune em and you wont be disappointed, they tolerate climate and altitude changes as well as barometric changes but not drastically, these are not EFI regardless they will perform like such when at peak/perfect operation conditions,

Go slowly on changes and do so one thing at a time, and document what you did so you have a log of such changes, is fun and you will learn a lot on the fly trust me,

You can use your factory mechanical fuel pump on a factory setup, as they just need from 4 to 6 PSI to function perfect, when problems arise on mechanical pumps is when cams and performance upgrades come in play with higher RPM's the fuel pump actuator shaft floats over the cam lobe and decrease the pressure eventually, you will learn, have fun and keep us updated in this!
SF5 FOZZY
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toyotero2dend
Posts: 495
Joined: Sat Jun 22, 2013 4:54 am
Location: New York

Re: help tunning my webbers

Post by toyotero2dend »

You can set em up with a syncrometer , you can find it in eBay $45.00 very easy to use ;)
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saigon9mm
Posts: 17
Joined: Tue Jan 07, 2014 10:56 pm

Re: help tunning my webbers

Post by saigon9mm »

Im wondering if with a stock cam they wont work right .. Right now the engine , head was cut .40 . I bought an msd sci and coil blaster an the jets are . Emulsion tube f16 . Main jet 145 .air correctors 190 , idle jets 50 f9 but if cant get it to run smooth im gonna get new 284 h cam an new valve springs an go from there . If im missing something any help would be great thanks ...
baldo
Posts: 310
Joined: Tue Aug 06, 2013 1:04 am

Re: help tunning my webbers

Post by baldo »

Everything runs better with a cam. If everything is stock you should get a down draft carb like a 38, not 32/36. If it had nos then they are set up rich. F16 is for a rich mixture, 145 and 190 jets are right on....... for a cam engine, you can probably keep the air but go down on gas. idle I would go 45. What are your venturis? They might be too big also.
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