ok i have a mikuni 44pph, racing beat upper, and gsl-se lower intake.
will this bolt up to my s5?

 

I don't think the GSL-SE lower will bolt up without modification...

 

Haha just noticed the avatar/user title... Nice lol...

 

the dude in your avatar looks just like you!! lol!!

 

holding he se mani up to the s5 they look identical.
what manifold are people using with their carb 2nd gens?
thank, --adam

 

anybody have a sidedraft on a 2g?

 

To find out if they are a match, simply call mazda and ask for the intake to block gasket part # for eacha nd see if they are the same.

 

First of all, It is completely beyond me as to why someone would want to go backwards in a sense of technology. Fuel injection is far superior and much more tuneable thru the entire rpm range. As far as boltability, I thought the GSL-SE had a 4 port motor. If that's the case, it won't work.

 

On top of all the other disadvantages of a carb, that one is far too small if you're looking for a performance improvement.

 

GSL-SE is a 6 port engine, similar to the S4.

I don't think the GSL-SE lower fits because the bolt holes in the gaskets are in different locations.

 

Backwards? I had a few 2nd gens with the FI and there was always something wrong TPS, Leaky injectors, MAF sensor, even water temp sensor failure affected the efi system. I have that setup with the Mikuni 44 on a s4 6port and car has WAY MORE power and a cleaner looking uncluttered engine bay. With the correct jets, hedder and open exhaust this setup makes for a very fun car. Its way cheaper then fixing the stock FI. Much worse on gas though. If you want NA power Carb is cheaper and simpler. If you have the money though, get an aftermarket FI system. There is one that looks like a weber downdraft that I heard alot of good things about.
GSLse is 6port I know it will fit s4 6ports but Im not sure of s5

 

i should have thought of that, good idea. i even have all the gaskets laying around.

 

any chance you could pm me the jetting setup your using?

 

the gaskets are an exact match.

 

Mabey thats because you removed the AFM and have a better flowing intake now? You could do the same thing with a standalone, and have way more tunability. A megasquirt would be cheaper than a carb set up too.


Run a megasquirt and put a GM tps on. Leaky injectors? Take them to a shop to be cleaned, problem solved. AFM? Gone. Water temp sensor, I dont see that messing up a megasquirt.

 

I was saying the stock EFI sux. I know there is good aftermarket standalone systems its just cheaper and easier to go with a carb and he already has one. Anyways the jets Im using are for a s4 which has lower compression then your engine are
Accel pump 90
pilot(idle) jets 62.5
Main Fuel Jets 190
Main Air jets 240
This is for stock or mildly ported engine with full race exhaust
PM me with any questions I can help you through the whole conversion
Also I reccomend the Jacobs FC1000 ignition its cheap and made a HUGE difference in low end.

 

thanks a lot man!

 

Youll love the Mikuni its the most streetable carb setup

 

dunno if its been mentioned yet, but Racing Beat has a carb manifold for 6 ports...runs like 250 bucks.

 

Sounds like you've had a collection of cheap, shitty FC's. Even so, all the problems you list are easy and relatively cheap to fix. The thermosensor failure is ironic, because all that would do it make the engine run badly when the engine's cold, just like a carb.

You're implying that that little carb is able to provide "way more power" than the stock EFI system, which I find very hard to believe. The only way that would happen is if the car was running very badly beforehand. Finding and fixing the problem probably would've given you way more power too.

This gets claimed a lot but I doubt there's very much truth to it unless you get most of the carb set-up for free and don't bother paying to have it properly tuned. EFI trouble-shooting can be frustrating if you don't understand the system very well, but most of the time it is not expensive to fix once the problem is found.

 

The pictures on the Mazdatrix site must be wrong then (or backwards, or maybe it's just me).

 

Enough with the with the carb. vs EFI people. We've rehashed this 10,000 times and the result is always the same. Face facts that all things being equal, EFI will always make more power then carburetors. It's proven time and time again.

 

Well, I hope I am allowed to retort. To some it up, if you always had somthing wrong, then you needed to fix the ****. Think about it, these cars are 20 years old. Parts do wear out. BTW, I have no problems with my fuel injection system. I know that has nothing to do with this. I will admit however, that improvements could be made, but that is taken care of by a more modern engine management system. One last thing to keep in mind, These cars are old. Technonlogy has improved since then. And lastly, I didn't realise GSL-SE was a 6PI engine.

Edit: Sorry Aaron, I felt I was being called out. You can close it now.