turbo 6 port?
06-02-06, 06:44 PM
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turbo 6 port?
ok, ive got a 13b NA 6 port sat (1988) in the back of my garage.....
Anyone had luck in turboing one high comp rotors and all?
All advice/experience gratefully received!
Steveo
Anyone had luck in turboing one high comp rotors and all?
All advice/experience gratefully received!
Steveo
06-03-06, 11:46 AM
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cartech had a kit in 86 (actually they had kits for the 1st gens too), 238hp on the stock na engine, and ecu. they did add a water to air intercooler, and a rising rate fuel pressure regulator.
06-03-06, 12:43 PM
#3
It's been done a bunch. Do a search.
We made 247 to the wheels with an stock -SE 6 port and a stock S4 TII turbo and manifold. We used an S5 NA intake. The turbo signed off about 6000 rpm leaving a bunch of power on the table IMO. We're prepping a new short block with ported irons and housings. We've Devcon'd the aux ports and produced a smooth radius instead of the brick wall that's cast in. With the same turbo I'm not expecting a ton more power because we're already limited by the small compressor. But when we finally put a bigger compressor to it I think the results will be impressive.
In short if you want to do a 6-port turbo there isn't much reason not to. But it's a lot of work and it's usually easier to find a complete TII and do the swap that way.
We made 247 to the wheels with an stock -SE 6 port and a stock S4 TII turbo and manifold. We used an S5 NA intake. The turbo signed off about 6000 rpm leaving a bunch of power on the table IMO. We're prepping a new short block with ported irons and housings. We've Devcon'd the aux ports and produced a smooth radius instead of the brick wall that's cast in. With the same turbo I'm not expecting a ton more power because we're already limited by the small compressor. But when we finally put a bigger compressor to it I think the results will be impressive.
In short if you want to do a 6-port turbo there isn't much reason not to. But it's a lot of work and it's usually easier to find a complete TII and do the swap that way.
06-03-06, 04:04 PM
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well im just thinking its easier to turbo a 6 port as 6 ports over here (in the UK) are ten to the dozen. if it blows i bolt on a new one with standard internals and exsisting pipework with very little expense.
So stock turbo bolts onto the exhaust flange what about plumbing it into the inlet? Crazy idea, but i wont be using any of the emissions equiptement so what about a direct line into that area od the lower inlet manifold istead of using the block off plates? I have taken the actuators (they are buterfly valves in the UK spec cars)out of the inlet so i can put a radius on the edge of the casting to split flow into the two ports no worries.
waht about intercooler? Any links of these setups? And also which rising rate fuel pressure regulator?
I'll be driving it on the street but also on the strip....aiming for 12 sec 1/4s (the engines in a beetle)
Cheers for the help so far!
steveo
So stock turbo bolts onto the exhaust flange what about plumbing it into the inlet? Crazy idea, but i wont be using any of the emissions equiptement so what about a direct line into that area od the lower inlet manifold istead of using the block off plates? I have taken the actuators (they are buterfly valves in the UK spec cars)out of the inlet so i can put a radius on the edge of the casting to split flow into the two ports no worries.
waht about intercooler? Any links of these setups? And also which rising rate fuel pressure regulator?
I'll be driving it on the street but also on the strip....aiming for 12 sec 1/4s (the engines in a beetle)
Cheers for the help so far!
steveo
06-04-06, 09:18 PM
#5
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C. Ludwig, What are you using for engine managment? Got any pics of the setup? I am still tryin to figure out a descent intercooling setup. Fabbing my own intake seems to be a more and more reasonable option than trying to snake intake everywhere. In the stock location the TB ends up tucked into a tight spot when mounted in a beetle. A low tubular intake manifold mounted to the stock plenum with the TB facing up with the intercooler above it would fit really nice.
Dubber91, what are your trans plans? 091, 901, built stock? I just shredded a stock Super trans with a measley 12A. A trans that will hold that much hp is not a cheap investment. Good to see more wankeled bugs around here
Dubber91, what are your trans plans? 091, 901, built stock? I just shredded a stock Super trans with a measley 12A. A trans that will hold that much hp is not a cheap investment. Good to see more wankeled bugs around here
06-05-06, 10:35 PM
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Ahh yes I have read all 8 pages of that before. Good to see some real #s and a good build record. Hmm I like the 100hp below 2500rpm on that dyno graph. No need to keep the aux ports functional with that kind of punch. The dyno graph peaks right before 6K, I wonder if it's from compressor efficency or port flow choking it. You did a great job on the intake. I think Ill do the same thing with my LIM. I better get some Alu tig practice. I'm a bit rusty. UIM and plenum location sucks for intercooler setup on a Beetle. A tublular UIM and plenum would be ideal for plumbing.
This gets me thinkin...
https://www.rx7club.com/showthread.p...ghlight=plenum
Low end would probably suffer alot without the progressive throttle body and no aux functioning
This gets me thinkin...
https://www.rx7club.com/showthread.p...ghlight=plenum
Low end would probably suffer alot without the progressive throttle body and no aux functioning
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06-07-06, 04:05 PM
#8
IMO two things are keeping the power choked off at higher RPM. One is the small compressor. Boost steadily bleeds off from the spike at 10psi when it first comes up. The 247whp is pretty stout for that compressor. I'd say that's about the limit. Second thing is the stock ports. The -SE ports are smaller than the S4/5 ports and the exhaust port is tiny by comparison. I'm assembling another engine for the same car right now. Just to see how far we can take the 6-port, and because all the plumbing is already there, we've stuck with an NA block. It's being street ported and the exhaust ports are being opened up. We're using TII rotor housings. Compared to the stock -SE engine the port area will be huge. I'm also using Devcon to smooth the end of the aux port runner. Pic below. These are early pics before final port cleanup. Gives you an idea of what we're doing.
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