So I want to build a n/a race engine. It's gotta be n/a and a 13b bridgy. I'm not sure what to go with. I've been planing to just rebuilt a gsl-se with some bridges in it. I was thinking a 4 port 13b with s5 rotors. What would I need to make that work. Who's done this I want 220whp...

you dont need a bridge to do 220whp

do a search in the engien forum, there is plenty to read about

Have you thought about going 13B Peripheral port. It's a N/A motor and you can get about 300HP. Run it with 51 IDA webber or if you've got the cash fuel injected.



Mike

I'd rather bridge. I love the sound. It's going to be a race car but It'll be street driven every weekend. From what I've found 280 was the wheel limit with PP's huh... It's hard to find bridge 13b info. It's all about 12a's...

The highest power out of a PP I've ever heard of was 350 fwhp. That's quite a bit and really pushing it. It seems that once you get into a good amount of port overlap, they all start sounding quite similar. There isn't really anything different about bridge porting a 12A vs a 13B. IF all you are looking for is 220 rwhp, just do a small bridge. There is no need to go too big because you start getting into unreliable as you cut into the water jacket.

okay we'll there are 8 different 13b's which would be the best to bridge port, or would a hybrid be best? Thats my simple question...

[quote name='Hyper4mance2k' date='Aug 27 2005, 03:12 AM']okay we'll there are 8 different 13b's which would be the best to bridge port, or would a hybrid be best? Thats my simple question...


[/quote]





Your simple question requires more information...#1: What is your budget, cash on hand to plunk down?

bidge port , id not go to a big bridge but a small would work just fine then run the 10-1 rx8 rotors. havent heard anyone with that set up yet, hell if ito can make 240 whp in the 8 why not try a 6 port with them rotors and a small bridge.

Money is not an object since this is going to be a longterm race project. I think I'mjust going to port and bridge some 12a end housings and put those in place of my 6port housings on my gslse block. then I'd have a bridgy 13b...

Money is always an object, and, as said before, 220 the the street is not difficult to make, wouldn't take a large amount of cash. Huge, dirty overlap ports aren't always the endall in making useful power, there's a lot to be said about the shape of the runners as well...

[quote name='Hyper4mance2k' date='Aug 26 2005, 11:50 PM']I'd rather bridge. I love the sound. It's going to be a race car but It'll be street driven every weekend. From what I've found 280 was the wheel limit with PP's huh... It's hard to find bridge 13b info. It's all about 12a's...


[/quote]





I know personally of a REPU with a PP putting down 326WHP.

yea i actually found a guy putting down 315 in a PP. Mow I'm pretty sure I'm going to get some 12a end housings bridge those and slap then on my gslse block with some s5 rotars. New goal is 250whp... Should beatainable with the setup planned. going to run a s4 t2 lower intake manifold with a 48dco weber with 44mm chokes. should be gr8!

so you plan on crippling yourself from the start by using one of the smallest oil pumps available?

well obviously I lacked that information. why don't you enlighten me with knowlege instead of counter productive critisisim....

Whose being critical? You still havent answered the $$$ Question. Before we can answer the ULTIMATE NA ENGINE question:



We need to know what class and what sanctioning body

We need to know the EMS or Carburation System used

What car is it going in with what mods







The 12A is the smallest pump around. This has been covered in mumerous subjects

[quote name='banzaitoyota' date='Aug 30 2005, 04:09 PM']Whose being critical? You still havent answered the $$$ Question. Before we can answer the ULTIMATE NA ENGINE question:



We need to know what class and what sanctioning body

We need to know the EMS or Carburation System used

What car is it going in with what mods

The 12A is the smallest pump around. This has been covered in mumerous subjects


[/quote]





banzai:



1) i dont think hes doing sanctioned races, could be wrong.

2) "48dco weber with 44mm chokes" or something, thats all i found on that side of the discussion

3) im thinking a 1st gen since he has a gslse block...i could be wrong.



i cant read this topic much cause i feel stupid reading the word "bridgy" to myself.



kevin.

You are correct and sorry about the bridgy that is what the auzzie's call it.

I have a GSL-SE block that is going to use the iorns from a 12a to get a 4 port bridgeport. As I've said before it'll be with a 48 DCO weber... I'm quite good tuning carbs so I'll figure that out my self. The issue is exactly what Ill need engine wise to acomplish everything. Gslse block w/ 12a iorns, and using a S4 t2 intake manifold. I think that'll fit. Then I plan in using s5 rotors, but I'm not sure If I'll need the whole rotating assembly. To include rotors e-shaft, bearings, and counter weights. This will be a bracket drag car. No rules. And money is not an object. I'm sorry if it is for you, get a better job... If it helps all I have to spend on the engine is $25,000 is that a good number for you?

i dont think the lower intake manifoold will fit on the 12A end plates. keep the GSLSE eccentric with modified oil jets. i had a similar set up with series 4 rotors, GSLSE eccentric, and T2 irons, with a racing beat side draft dellorto manifold to a S5 T2 lower intake...hood didnt close all the way.

good idea i didn't think of t2 iorns. since I've allready got the mani i might as well match it to some iorns. plus those flow better than 12a housings if i'm not mistaken. less port work will be needed. So find some t2 iorns and s5 rotors and slap then on my modded current e shaft. get a modded t2 oilpump and pressure regulator. and I'm set for 250rwhp. ummm thats hot! lol and as far as hood clearence goes I'll probably cowel the hood.

just had a thought aren't the water jackets in the side housings in t2 engines. cause i think it's in the rotor housings in the gslse engine so I couldn't use the t2 iorns with gslse housings. huh... if i do use 12a iorns what manifold will i need? maybe it'll just be easier to go PP lol...

does ayone know?

you need to get 2nd gen rotor housings to mate up with the t2 irons. buy new ones too! plz?

[quote name='Hyper4mance2k' date='Aug 30 2005, 11:18 PM']You are correct and sorry about the bridgy that is what the auzzie's call it.

I have a GSL-SE block that is going to use the iorns from a 12a to get a 4 port bridgeport. As I've said before it'll be with a 48 DCO weber... I'm quite good tuning carbs so I'll figure that out my self. The issue is exactly what Ill need engine wise to acomplish everything. Gslse block w/ 12a iorns, and using a S4 t2 intake manifold. I think that'll fit. Then I plan in using s5 rotors, but I'm not sure If I'll need the whole rotating assembly. To include rotors e-shaft, bearings, and counter weights. This will be a bracket drag car. No rules. And money is not an object. I'm sorry if it is for you, get a better job... If it helps all I have to spend on the engine is $25,000 is that a good number for you?


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With a budget of 25,000 for an engine why **** around with tII parts and all this other bullshit? Get a 20B, baller.

Friend of mine did a pp 13b (factory housings) s4 6 port rotors little porting, 55 ida style throtle body , motec ecu with methnol injected at high rpm . It made 385 fwbph @ 8500rpm.

i don't want a 20b i want a bridgeport 13b

Well IMO if you want to spend that kind of money on a bridgeport I would get everything lightened and balanced and make the power higher up the revvs, which you're probably going to have to do to get really decent power. I like this idea though.



Mark

Well mine is putting out 225hp on stock internals. So I would say that if you were to get everything balanced out and tune it well you could be in the same boat or better. All of the advice in this thread applies.

Stick to an 86' block, Bridge Port the engine get all new seals and get to tuning. This should not cost you more than $2500 if you are willing to do some of the work yourself.

As for the ultimate N/A... This setup will give you the best bang for the buck. Believe me.

[quote name='Hyper4mance2k' date='Sep 2 2005, 04:19 AM']good idea i didn't think of t2 iorns. since I've allready got the mani i might as well match it to some iorns. plus those flow better than 12a housings if i'm not mistaken. less port work will be needed. So find some t2 iorns and s5 rotors and slap then on my modded current e shaft. get a modded t2 oilpump and pressure regulator. and I'm set for 250rwhp. ummm thats hot! lol and as far as hood clearence goes I'll probably cowel the hood.


[/quote]

yeah i kinda goofed. i started with a block from an 86, cause 1 rotor/housing was fubar on my GSLSE block.

Scweed thanks for the posi responses. So i find any s4 or s5 block with some turbo housings and s5 rotors and my t2 mani with a 48 dcoe and I'm set. I'm a pretty good webertuner so I hope this should put me in the 250whp range. Thanx. If I go cheap and use the gsl-se block and old 12a housings w/ s5 rotors does anyone know what intake manifold I should use for a side draft weber? I'm thinking that the s1 13b RB manifold should work right?!?!