Junia

Does anyone in the states run a bridgeport turbo with a carb? I know I've heard alot of people say that you can't turbo a bridgeported motor but I've seen alot of them but they were mostly 13b and fuel injected. I've only seen one 12A bridgeported and turbocharged and that was back in japan but I'm not in japan right now. I just wanted to know if anyones gone that route and wanted some opinions about the setup because I would like to go turbo in the future.

The_7

someone posted a vid of a 12 bridgy turbo like a month ago....i dont know too much about the setups but it would be awesome to have, i would like to do a half bridge turbo cause its gonna be my daily driver

Mschafe

Yeah.. my friend (WackyRotary on the forum), slapped his Carbed Turbo 12a setup on his Bridgeport. It actually lasted longer than I thought, and was quite fun until the carbon seals went bye bye. I posted a couple videos I took riding in the car about a month ago if you want to search.

Matt

Jeff20B

iTrader: (13)

I remember those videos. It looked like fun while it lasted.

Zeta-Gouki

I still have them.

rx72c

iTrader: (8)

CAn i have them

680RWHP12A

i run a bridgeport turbo 12A .... tuning is almost impossible but well worth it!!!!

R.P.M.

iTrader: (3)

Yeah I've had a ride in a 12a bridgeport turbo and even at 5 psi boost it was a rocketship!!!

heb09

would it be easy to turbo my 12a bridgeport keeping the existing 465holley on it?

Directfreak

iTrader: (2)

Yes, but that Holley is too small.

heb09

does that just mean less power? Or just a no go?

Directfreak

iTrader: (2)

It means the engine will choke at higher RPM. just like having too small a Turbo, etc..

heb09

does that cause damage?

NanaimoRx-7

Ha

ha

ha.


Oh Man.

heb09

great

DriveFast7

iTrader: (1)

too small a carb will not damage the engine assuming it's tuned properly of course.

in this instance it just won't make power in the upper rpms, which is where the powerband of a bridgeport is. it's being choked like directfreak said!

heb09

so 240hp at 7500rpm is not making hp in the top end?

wwilliam54

mm brap..brap.brapp
spool

REVHED

It depends on a lot of things ie, exhaust and intake tuning, port size and timing etc, but a decent sized bridgey should make peak power higher than 7500rpm.

heb09

anyone got any ideas why with the big fuel pump on my powerband seems to dissapear from lower rpms and sometimes splutters at high rpms... I found a loose hose in the fuel line the other day which leaked when I had the big fuel pump on. I tightened it up and it seemed to help. One end of a hose has a dodgey clamp on it which is applying little pressure. Would it be possible that air is getting sucked in threw this loose connection and affecting my powerband? I plan to get a better clamp tomorow when the darn shops are open btw. This arvo I was in 4th doing around 4000rpm, and I dropped 3rd and it spluttered like a pig Thats with the big fuel pump on. With the little on I cant take it past 5000rpm because it runs to lean and is bad for the seals etc. Although it will go past 5. Sometimes when I rev it out to 7 with the big fuel pump it is fine, but it doesnt seem to be hitting powerband hard at all? Man these rotarys are hard to work out

Directfreak

iTrader: (2)

I still think
a) Your carb is too small for a bridgy 12A
b) You have too much fuel pressure
c) that you don't have 240FWHP (what are you basing this on?
d) You don't have enough Fuel Pressure

Any combination of the above.

heb09

240hp was from a dyno read when it was bridgeported. I know the 465 holley is too small and I plan to fix it up with a webber, but it seems that it has alot to do with when I stomp on it. Some days I get it perfect and theres no problems and days like today I just think theres sometin not right... The guy I bought it off was an absolute rotary nut. When he took me for a drive he drove it pefecto. Should I be easing on the gas more until high revs if I have the bigger fuel pump on? Hopefully I will solve this problem tomorow, but I still appreciate all the feedback

The bloke I bought it off put the smaller pump on because of the noise the big/standard one made. The fact that it leans out too much over 5000rpm with the small pump on and looses power should be enuff reason for the bigger pump? Please throw your suggestions whatever they may be

79+80+84_rx-7

okay... first off... you shouldnt hijack the damn thread..

but yeah... you should be running a 600cfm holley... I dont believe 240hp... more like 180rwhp(specially with your carb issues...) .... a mallory, or *coughcartercough* should be fine for the car... aslong as you have a fuel pressure regulator set to 6 psi...

so get a rb holley 600... a mallory fuel pump, mallory fuel pressure regulator, a decent fuel pressure gauge.... tune it to 6 psi...

then you should be good to go...

Directfreak

iTrader: (2)

So you had it dyno'd on an ENGINE Dyno out of the car?

Yes, you need a bigger pump. Lean = "pop".
Yes, you need a bigger carb, but if you're not running lean, and you're satisfied with the power, then wait.

Aaron Cake

iTrader: (1)

I know someone running a half bridge turbo 12A. I believe it is the stock S4 or S5 (Hitachi T-18) turbo on a custom manifold. Runs a Weber side-draft. Apparently the car goes like stink (and sounds hellacious). It has ran like this for about 8 months now.