View Poll Results: Which route would you go?
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1990 Vert project
OH SNAP!
Joined: Aug 2005
Posts: 2,204
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the n/a rx7 is shit. the entire drivetrain is WEAK... even if u keep the n/a and upgrade to the T2 drivetrain. You would have to have some serious porting done to keep up with the modded sr20det's.
T2 stock whp is 185-210 to the wheels
sr20det stock whp is 200-220 to the wheels
N/A stock whp is 143-165 to the wheels
all based on stock everything
now if you wouldnt jump the gun and just ask what i've decided on, you would know what the fuck imma do with it. since no one has asked, i spose i'll tell now.
It'll be rebuilt with some heavy porting done. true dual exhaust, air pump and emissions removed, a/c removed and a haltech e6k or an rtek. ignition will be upgraded accordingly and a nice shot of nitrous will be added and tuned for it. I am upgrading to the T2 drivetrain while i'm at it.
T2 stock whp is 185-210 to the wheels
sr20det stock whp is 200-220 to the wheels
N/A stock whp is 143-165 to the wheels
all based on stock everything
now if you wouldnt jump the gun and just ask what i've decided on, you would know what the fuck imma do with it. since no one has asked, i spose i'll tell now.
It'll be rebuilt with some heavy porting done. true dual exhaust, air pump and emissions removed, a/c removed and a haltech e6k or an rtek. ignition will be upgraded accordingly and a nice shot of nitrous will be added and tuned for it. I am upgrading to the T2 drivetrain while i'm at it.
Now to actully help you out.
Try ordering your s5 stuff online. You can usually get a tranny,ecu,wiring harness and engine. Chances are all them are good minus the engine. Its either a hit or miss. but id still recommend a rebuild before you drop it in your car. ive seen them from 1500-2k for the full set up on ebay and other online stores. Check rx7club for the shops that sell everything. If your doing the swap you might as well do it with the best engine to start off with.
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Driving definitions: Understeer is when you hit the wall with the front of the car and Oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and Torque is how far you take the wall with you.
eats babies
Joined: Jun 2005
Posts: 2,755
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^Are you serious? 13b N/A motors are SHIT, they are the shittest fucking motors around. They wouldn't even be able to still see the rear bumper of a stock SR'd 240. First off you can't port them that much (compared to a TII), the ports are smaller then hell, a big streetported 6port plates will only be as large as STOCK port TII plates. You HAVE to run a aftermarket ecu if you want to even consider hitting over 200rwhp with 6port plates and no turbo. Just about the ONLY thing good in that ENTIRE drivetrain is the rotors and the eccentric shaft (for a 9.4/9.7 turbo swap). If someone wants a "fast" daily driver FC it has to have a turbo, sure you can do a full bridge'd 4port/no turbo and it will be quick, but a lightly modified turbo FC will hang with it all day long. Plus the turbo engine will be more reliable and will kill that full bridge after a BNR or equivilent turbo and an Rtek2.0 or megasquirt/haltech/wolf ecu etc.. Atleast get some 4port irons if your running non-turbo, you will have ALOT more room for more horsepower.
Registered User
Joined: Feb 2007
Posts: 1
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Wow....
I'm not fond of shite talking....so I will put in my 2 cents, from first hand experience.
"Are you serious? 13b N/A motors are SHIT, they are the shittest fucking motors around. They wouldn't even be able to still see the rear bumper of a stock SR'd 240."
WRONG. 2 years ago my 87 GXL NA with light mods, no porting, kept up pretty well to a sr20det equipped, s13 bodied 240sx with downpipe, exhaust, and intake. It was from a roll on a highway, and in 4th he started pulling on me, but it was not a total spanking. That was with the ultra long GXL gearing that further detracts from acceleration.
"First off you can't port them that much (compared to a TII)"
TRUE. You can perform much more porting on the 4 port irons.
"the ports are smaller then hell, a big streetported 6port plates will only be as large as STOCK port TII plates."
WRONG. Stock for stock, the 13bt (turbo) primaries are larger, but the secondary intake ports on the 6pi NA are much larger. They have more volume/area, and close timing is MUCH later than stock 13bt secondary ports.
"You HAVE to run a aftermarket ecu if you want to even consider hitting over 200rwhp with 6port plates and no turbo."
For over 200rwhp, yes...For 200rwhp, NO. All you need as far as engine management goes is a piggyback AFC. You can do an aux port bridge on the stock ecu with an afc. If you switch to 4 port irons and do a half or full bridge, or peripheral port, you need a different ecu or carb setup. Bridgeport NA's will make 200-280rwhp, Peripheral port NA's will make 200-320rwhp.
"Just about the ONLY thing good in that ENTIRE drivetrain is the rotors and the eccentric shaft (for a 9.4/9.7 turbo swap)."
Why would you use high compression rotors in a turbo motor? If you go with a 13bt, stick to the stock rotors, whether it be 8.5:1 or 9:1. The horsepower potential will be much greater.
"Plus the turbo engine will be more reliable and will kill that full bridge after a BNR or equivilent turbo and an Rtek2.0 or megasquirt/haltech/wolf ecu etc.."
Unless you are cutting into the water jacket O-rings for a bridgeport, a non-turbo 13b will outlast a turbo 13b by many, many miles.
I'm not fond of shite talking....so I will put in my 2 cents, from first hand experience.
"Are you serious? 13b N/A motors are SHIT, they are the shittest fucking motors around. They wouldn't even be able to still see the rear bumper of a stock SR'd 240."
WRONG. 2 years ago my 87 GXL NA with light mods, no porting, kept up pretty well to a sr20det equipped, s13 bodied 240sx with downpipe, exhaust, and intake. It was from a roll on a highway, and in 4th he started pulling on me, but it was not a total spanking. That was with the ultra long GXL gearing that further detracts from acceleration.
"First off you can't port them that much (compared to a TII)"
TRUE. You can perform much more porting on the 4 port irons.
"the ports are smaller then hell, a big streetported 6port plates will only be as large as STOCK port TII plates."
WRONG. Stock for stock, the 13bt (turbo) primaries are larger, but the secondary intake ports on the 6pi NA are much larger. They have more volume/area, and close timing is MUCH later than stock 13bt secondary ports.
"You HAVE to run a aftermarket ecu if you want to even consider hitting over 200rwhp with 6port plates and no turbo."
For over 200rwhp, yes...For 200rwhp, NO. All you need as far as engine management goes is a piggyback AFC. You can do an aux port bridge on the stock ecu with an afc. If you switch to 4 port irons and do a half or full bridge, or peripheral port, you need a different ecu or carb setup. Bridgeport NA's will make 200-280rwhp, Peripheral port NA's will make 200-320rwhp.
"Just about the ONLY thing good in that ENTIRE drivetrain is the rotors and the eccentric shaft (for a 9.4/9.7 turbo swap)."
Why would you use high compression rotors in a turbo motor? If you go with a 13bt, stick to the stock rotors, whether it be 8.5:1 or 9:1. The horsepower potential will be much greater.
"Plus the turbo engine will be more reliable and will kill that full bridge after a BNR or equivilent turbo and an Rtek2.0 or megasquirt/haltech/wolf ecu etc.."
Unless you are cutting into the water jacket O-rings for a bridgeport, a non-turbo 13b will outlast a turbo 13b by many, many miles.
Last edited by t2 Under Pressure; Feb 18, 2007 at 12:17 PM. Reason: Correction
Thread Starter
Registered User
Joined: Jan 2007
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t2 under pressure is the guy i've been talking to since i've gotten into the rotary scene... very kool guy and knows his rotary shit for sure (rep given)...
as for the n/a with light mods keeping up with a light modded sr20det, i'd have to see it to believe it.
as for the n/a with light mods keeping up with a light modded sr20det, i'd have to see it to believe it.
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I BURN OIL N I LIKE IT!!!
Joined: Jun 2004
Posts: 857
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hehe then you shoulda been there the good handfull times i beat sr20 powered 240sx's. stock ports and 200k plus on my motor. i did have a good handfull of mods. which all of them added up would have to be $300 max and about 180whp just consider power to weight ratio. theres so much weight and useless shit i took of my car i coulda filled the back of the bed of a pick up truck.
to be honest with you you started at the bottom of the bottom. s4 convertible(heaviest FC ever).
like ive said before GOOD LUCK. your gonna need it.
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Very Proud Member of R.A.P.S.
R.A.P.S member number #0003
Rotaries
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Swaps
Last edited by rexaholic7; Feb 18, 2007 at 02:20 PM.
