A good Mod??

[m0nee]

Okay so I've always wanted to drive a Turbo car. Unfortunately, I have been unsucessful in finding a TII motor for a GTU body that I am purchasing. Instead, I was able to locate a regular 13B motor in hopes to modify a turbo in it. I have a few questions for ya'll

a) What's the hp / torque / ratio of a regular 13B of an 87 RX7 SE?

b) What about for a TII and or the 13BTT?

c) On average, what's the 0 - 60 mph timing and qtr miles timing?

d) Will the regular 13B be able to handle boosts from a modified turbo?

e) If proceeding with (d) what am I looking to replace in the motor itself?

[MBTN]

13B on an 87 is about 145/140 HP/TQ

TII on an 87? 185/185 ish I believe. 13BTT is the motor that's on a 2nd gen Turbo.

0-60 for 13B S4 is around 7.8
1/4 Mile is around 16.2

Regular 13B might only be able to handle mild boost of around 5lbs or so, but don't quote me on that.

It's cheaper to swap a turbo motor instead of turning an NA into a Turbo. You also need to swap the tranny.

[m0nee]

OMG, That's friggin horrible. I thought it would be a monster since it's running on rotors. It only does 16.2 in a qtr mile, pushing 145hp? Wow, so are you telling me that my honda can beat an RX7 then (atleast a non-T). My single head honda all motor run's 15.1, no NOS, no turbo and no super. All I ever hear is rotary this, rotary that... it has persuaded me to go buy one, only to find out that my Honda with little work on it would probably kick half their a$$es. Somebody please re-confirm to me the number as I am trippin and buggin at the moment.

[J-Rat]

86-88 NA = 146 HP @ 6500 RPM w/ 138 Ft/lb @ 3500 RPM
86-88 Turbo = 182 @ 6500 RPM w/ 183 Ft/lb @ 3500 RPM
89-91 NA = 160 HP @ 7000 RPM w/ 140 Ft/lb @ 4000 RPM
89-91 Turbo = 200-202 @ 6500 RPM w/ 196 Ft/lb @ 3500 RPM
Infini IV = 215 @ 6500 RPM w/ 206 Ft/lb @ 3500 RPM

I will race your Honda! Bring it! lol!! The point is, the rotary is PAINFULLY easy to make faster. Dont let the factory numbers fool you. The car is FAST!


Jarrett

[Steel]

Originally Posted by m0nee

OMG, That's friggin horrible. I thought it would be a monster since it's running on rotors. It only does 16.2 in a qtr mile, pushing 145hp? Wow, so are you telling me that my honda can beat an RX7 then (atleast a non-T). My single head honda all motor run's 15.1, no NOS, no turbo and no super. All I ever hear is rotary this, rotary that... it has persuaded me to go buy one, only to find out that my Honda with little work on it would probably kick half their a$$es. Somebody please re-confirm to me the number as I am trippin and buggin at the moment.

So you bought one, just cause people SAID it's fast.. without even reseaching?

Your honda may be a BIT faster.. but the 7 will outhandle it any day.

[Soyo]

I'd offer you a race in my stock 91 if my clutch wasn't going out 0-60 is supposed to be 7.2 but my best was just under 8 seconds, take into consideration I've only driven 5spd for like 2-2 1/2 months and my tires are horrible so I can't launch at all... and 1/4 mile time is said to be 15.9, never ran mine though. just sell the rx7 body and keep your honda, thats my honest opinion cuz you don't seem to know anything about rx7's or rotary engines all together, so keep your honda, it won't break down on you

[Jims5543]

Non-tourbo RX-7's are not that fast. I hear a lot of them run in the 14's mid to high. I have also seen a couple run in the high 13's.

The beuty of a non-turbo RX-7 is it will take a hell of a beating and keep coming back for more. As long as you maintain it correctly.

If you want a fast RX-7 you are looking for a turbo. It took very little for me to get my stock 87 down to a 13 flat 1/4 mile.

Now with my engine swap (you thought only honda guys did that huh?) I will be solidly in the 11's and my car isnt even set up for 1/4 mile. You do not want to come up against it in an Autocross or Road Course. If you think its fast in a straight line you should see it in turns.

Dollar for Dollar you cannot beat a Rotary for HP gains from mods.

A racing beat exhaust will get you 60 HP on a 87 Turbo. How many hondas gain 60 HP just from changing out the exhaust??

[MBTN]

Besides, it's an absolutely PUNY 1.3liter motor making 145HP. I'd say that's quick for a mere 145HP.

[Soyo]

Originally Posted by Jims5543

Non-tourbo RX-7's are not that fast. I hear a lot of them run in the 14's mid to high. I have also seen a couple run in the high 13's.

The beuty of a non-turbo RX-7 is it will take a hell of a beating and keep coming back for more. As long as you maintain it correctly.

If you want a fast RX-7 you are looking for a turbo.

Dollar for Dollar you cannot beat a Rotary for HP gains from mods.

A racing beat exhaust will get you 60 HP on a 87 Turbo. How many hondas gain 60 HP just from changing out the exhaust??

racing beat also has the Catalytic Converter Replacement Pipe with Presilencer that gains 26 HP on a turbo($245) and 18 on a non-turbo($290)

and you want proof rx-7's are fast?

how about that for proof?

heres a drag rx-7
http://www.rotormaster.com.au/dragcars_rx7series2.asp
I've never seen a hond run a 7.5 or even go 172mph


and heres a site some guy made about a $3,000 rx-7 with just exhaust, spring, and tires vs. his $20,000+ modded prelude on the track... he ends up getting an rx-7 not long after...


And yes your right the NA rx7 isn't that fast, but it is definately fast on the track, better lateral acceleration than almost any other car(besides the turbo model and the FD ofcourse) but I think getting the NA into 12's in the quarter mile is easily possible with a large budget... personally I just want to eventually get my car into low 13's as a non-turbo and reliable... and be set up for the track/drifting(with different tires on the back ofcourse)
but the non-turbo can get into the high 14's without a ton of money and still be very very reliable...

[m0nee]

hAhA... okay now, don't hate on Honda's now. I was just kidding about the a$$ kicking RX7's and stuff. I know they're pretty quick. Well, like I stated in a thread I posted about 2 weeks ago, I was quite amaze and inspired one time when a friend of a friend came from out of town with his RX7 to race a Viper in the Boston Area. The guy popped a wheelie and ate up the viper right from start. We then head up to the tracks in NH that weekend and he hit up a 9 secs flat.

Okay!! So, you guys got me. I don't know squat about RX7's. But guys... are you serious about the 60HP on a Racing Beat exhaust and 18HP on their cat converter?? Well, on average, how much $$ am I looking at for the exhaust?? Also, how much HP's will I get out from a non-turbo? Many that's some crazy HP gains. Hey- Ya'll just playing with my head huh??

[J-Rat]

Actually, the gains from the RB system are quite signifigant. If you want my opinion, the N/A just doesnt have the potential to be a REAL fast car. The Turbo II does. IF all you want is sheer acceleration, then you may want to consider another car. If you want good acceleration, coupled with handling the likes of which youve never experienced before, go with that N/A.

[m0nee]

J-Rat -- what about a custom turbo?? How well will that do?? I am possibly going to be putting in a turbo into the na that I'm buying. You think that will be any good... explain?? and what would need to be replaced, removed etc... thanks!

[MBTN]

I wouldn't say exhaust adds 60HP... Maybe with header, presilencer, replacement pipe and aftermarket exhaust you'd see a 40HP gain. Which is quite impressive anyway! I hope to be doing this over the summer. All I need is to find a crooked emissions inspector!

[m0nee]

AHhh... I knew these guys are screwing with my head. Yeah, I thought so! So yeah I can believe that!

[Soyo]

Originally Posted by MBTN

I wouldn't say exhaust adds 60HP... Maybe with header, presilencer, replacement pipe and aftermarket exhaust you'd see a 40HP gain. Which is quite impressive anyway! I hope to be doing this over the summer. All I need is to find a crooked emissions inspector!

if you put an intake and headers, downpipe, presilencer and full cat back with gutted cats you can get 30 if not a few more from a non-turbo I bet... I would not doubt getting around 60 with a turbo because air flow on a turbo is import and makes horsepower jump way up

if you want to be fast like 13's and want it to be reliable I'd say go for the non-turbo, but if you want 12's or lower get the TII cuz the non-turbo won't get you there, atleast none that I have heard of... that would be nice to see a non-turbo 2 rotor in the 12's