Author Topic: Another carb question SOLEX 32 DIS  (Read 10781 times)

MATT BLACK

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Another carb question SOLEX 32 DIS
« on: 11:23, Thu 04 November 2010 »
The set up on my car is now back to standard after replacing a lot of vacuum pipes and botched wiring ( someone had been playing with it that didnt know what they were doing ) Ive fitted a brand new turbo, Pace intercooler, new exhaust, new rad, plugs, distributor cap, temp sensors etc + various other ancileries and now the car goes like snot of a stick and is running really well. The original turbo had a large crack on the wastegate housing.

What would you guys recommend running the standard T2 at and would you recommend rejetting the carb for the sort of horsepower gains i will get with a standard T2 or do i just leave it as it is.

Any other advice will be greatly appreciated ( going in for rolling road tune Sat morn )

Thanks
Matt

( just read Steve's post on carbs in the tech section - excellent post )

scratcher

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Re: Another carb question SOLEX 32 DIS
« Reply #1 on: 13:01, Thu 04 November 2010 »
Its not recommended to take the T2 over 16psi as that's said to be the limits of its efficiency. After that you'll just be blowing hot air.
For the 16psi you'll need to check the fueling and carb re-jetted to suit.

At a guess at 16psi you'll be looking at ~140BHP?

James5

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Re: Another carb question SOLEX 32 DIS
« Reply #2 on: 13:14, Thu 04 November 2010 »
Quote from: "scratcher"
Its not recommended to take the T2 over 16psi as that's said to be the limits of its efficiency. After that you'll just be blowing hot air.
For the 16psi you'll need to check the fueling and carb re-jetted to suit.

At a guess at 16psi you'll be looking at ~140BHP?


Agree with Scratcher 16psi carb top is the max i would take a T2 to, but you will need to look to see what the fueling is at via a wideband kit.

Standard carb is good for about 13psi carb top before jetting needs to be done

MATT BLACK

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Re: Another carb question SOLEX 32 DIS
« Reply #3 on: 14:15, Thu 04 November 2010 »
So if i run the car at 15 / 16 psi max on the standard blower do i just need to drill the main jet at the base of the carb ? and if im running at 15 / 16 psi what size drill / jet do you recommend ?

I dont have access to a wideband kit either but the car is being set up on Saturday at the powerzone in Burnley.

Can i buy the jets and can they be fitted easily enough with the carb bolted onto the inlet ?

Thanks for your help lads

James5

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Re: Another carb question SOLEX 32 DIS
« Reply #4 on: 14:28, Thu 04 November 2010 »
Ok here is a quick guide to what jets to modify:

Needle jet - this can be increased in an attempt to stop the carb fuel bowl from emptying normally when running higher boost than standard (Dependant on setup) and normally only required when a high lift cam is in use that allows higher rpm's.

The 1st stage (the removable screw in jet that is inside the triangle enricher section) is only 1mm - if this has been increased then it'll get too rich when you give it alot of throttle, before boost comes on. Some tuners used to swap this jet around with the a/c! cheap skates, it made the fuel curve bloody horrible.

The 2nd stage only comes alive after a few psi of positive boost (This is where jetting is required).

Normal driving is a real pig, that NEEDS a smaller main jet (so stay standard as long as you can)!

The air corrector does't make a huge difference at normal driving rpm's, it has more effect on boost and higher up the range.

MATT BLACK

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Re: Another carb question SOLEX 32 DIS
« Reply #5 on: 14:33, Thu 04 November 2010 »

James5

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Re: Another carb question SOLEX 32 DIS
« Reply #6 on: 14:51, Thu 04 November 2010 »
You really need a wideband kit to up the boost and match the fueling.  Changing the main jet will just create rich idle and off boost driving. All the jetting you will need to do is to the air corrector jet and the 2nd stage jet which is a non removable jet and will require drilling out with micro drill bits.

markey mark (bd)

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Re: Another carb question SOLEX 32 DIS
« Reply #7 on: 17:17, Thu 04 November 2010 »
For thte boost increase on a standard T2 to around 15psi you'll more than likely only have to drill the 2nd stage enrichment jet out to 1.1mm or 1.2mm and that should be enough.
But as mentioned best of using an AFR gauge too just to make sure its done the job correctly.

Whatever you do, do not fit a larger main jet. There's no need to fit one until your at some real high power and even then its not neccessary. I still got 1.2mm main on my car and run in excess of 220bhp.
BD Autosport - Renault 5 gt turbo tuning and repairs.

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Re: Another carb question SOLEX 32 DIS
« Reply #8 on: 22:22, Thu 04 November 2010 »
Quote from: "markey mark (bd)"
I still got 1.2mm main on my car and run in excess of 220bhp.


And that little campus fooking shifts :lol:

MATT BLACK

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Re: Another carb question SOLEX 32 DIS
« Reply #9 on: 08:55, Fri 05 November 2010 »
Ok - good advice, so basically dont fit the 2 items below.

http://www.k-tecracing.com/show_product ... 3&appid=16
http://www.k-tecracing.com/show_product ... 8&appid=16 ( 1.3mm )


I removed the carb last night and stripped the "triangular section" down to reveal the 1st stage and 2nd stage jet. So i basically drill the 2nd stage carefully with a 1.1mm drill ? and that will be sufficient enough to fuel at 15 / 16 psi ?

( got myself a carb rebuild kit as well )

Also is the standard 12v fuel pump ok at this power or do i need to upgrade ?


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Re: Another carb question SOLEX 32 DIS
« Reply #10 on: 09:07, Fri 05 November 2010 »
Sounds like you are doing the right thing.

Standard pump should be fine for that level of boost.

MATT BLACK

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Re: Another carb question SOLEX 32 DIS
« Reply #11 on: 11:41, Fri 05 November 2010 »
How far into the jet do i need to drill ??

The tip of the drill bit seems to slide into the jet by around 2 - 3 mm. Do i proceed to drill further or would you suggest that its already been done ?

Out of interest do any of you lads offer a service to set these up with a wideband afr reader ?

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Re: Another carb question SOLEX 32 DIS
« Reply #12 on: 12:49, Fri 05 November 2010 »
Quote from: "MATT BLACK"
How far into the jet do i need to drill ??

The tip of the drill bit seems to slide into the jet by around 2 - 3 mm. Do i proceed to drill further or would you suggest that its already been done ?

Out of interest do any of you lads offer a service to set these up with a wideband afr reader ?


Sounds like you have drilled it fine, you will need to give it a good clean through with carb cleaner as no doubt a small bit of swarf will be in the carb.

With ref to a wideband service or someone setting up Markey Mark used to offer that service and I am not sure if he still does.

andybond

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Re: Another carb question SOLEX 32 DIS
« Reply #13 on: 12:51, Fri 05 November 2010 »
Mark is at t'other end of country for Matt.

MATT BLACK

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Re: Another carb question SOLEX 32 DIS
« Reply #14 on: 13:29, Fri 05 November 2010 »
lol - its grim up't North