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S4 vs S5

 
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jptg



Joined: 25 Jul 2005
Posts: 66
Location: CA

PostPosted: Thu Aug 25, 2005 1:03 pm    Post subject: S4 vs S5 Reply with quote

Hey guys, do you know what is the difference between s4 vs s5 engine, tranny and etc. I have been hearing alot of parts that are from an s4 or s5. I have a 1988 13B TII and I dont know if this is an S4 or S5. Thanks -JP
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Blake
Been there, done that


Joined: 12 Jul 2005
Posts: 135
Location: Portland, OR

PostPosted: Thu Aug 25, 2005 5:11 pm    Post subject: Reply with quote

A 1988 TII is a "Series IV" (79-80 is Series I, 81-83 is Series II, 84-85 is Series III, 86-88 is Series IV, 89-91 is Series V, 93-95 is Series VI). Lots of small differences...too many to list. The S4 TII made 186 BHP and the S5 TII made 200 bhp. S4 is way more common, the parts less expensive and you can make up the power difference very easily.
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Blake Qualley
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jptg



Joined: 25 Jul 2005
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PostPosted: Thu Aug 25, 2005 11:43 pm    Post subject: Reply with quote

thanks
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jptg



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PostPosted: Sun Oct 02, 2005 11:33 pm    Post subject: Reply with quote

What kind of power differences does a S4 engine can make versus the S5 engine? Thanks JP
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Blake
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Joined: 12 Jul 2005
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PostPosted: Mon Oct 03, 2005 11:31 pm    Post subject: Reply with quote

jptg wrote:
What kind of power differences does a S4 engine can make versus the S5 engine? Thanks JP


Stock, the NA (non-turbo) S4 made, I believe, 146bhp and the S5 made 160bhp. The S4 turbo made something like 186bhp while the S5 turbo made an even 200 bhp. "BHP" is "brake horsepower" and, because of the method of measurment, it always equates to the power "at the flywheel"; not "at the wheels". Just throwing that out there for those who may be unfamiliar with the term.

There were many differences between the S4s and S5s. Not only were the compression ratios changed but the rotors became lighter, the ECUs got more advanceds, intakes redesigned, and more. On the turbos, the boost also went up. Hard to nail down just one thing or even slip the gains on some sort of line-item.
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jptg



Joined: 25 Jul 2005
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PostPosted: Tue Oct 04, 2005 5:23 pm    Post subject: Reply with quote

Would it be advisable to switch my S4 stock turbo to a S5 stock turbo with stock internals? Or should I switch to a 3mm apex seals first just to be inthe safe side? then my car is 1988 TII. Thanks Blake. JP
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DMRH



Joined: 28 Oct 2005
Posts: 5
Location: Sydney, Australia

PostPosted: Fri Oct 28, 2005 4:03 pm    Post subject: Reply with quote

Blake wrote:
A 1988 TII is a "Series IV" (79-80 is Series I, 81-83 is Series II, 84-85 is Series III, 86-88 is Series IV, 89-91 is Series V, 93-95 is Series VI). Lots of small differences...too many to list. The S4 TII made 186 BHP and the S5 TII made 200 bhp. S4 is way more common, the parts less expensive and you can make up the power difference very easily.


Series-6 = 92-95 actually....... Rolling Eyes

If you want one of these engines, then get the series-5 as Mazda did a redesign of the engine production techniques in 89 for the series-5 & the differences do show.

REgards
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Blake
Been there, done that


Joined: 12 Jul 2005
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Location: Portland, OR

PostPosted: Fri Oct 28, 2005 5:30 pm    Post subject: Reply with quote

DMRH wrote:
Series-6 = 92-95 actually....... Rolling Eyes


Well, not here. We didn't get *any* 1992 model year RX-7s. While they started selling the 3rd gens in 1992, they were all 1993 model years. And, here again, all the Mazda parts books list 2nd gens as being through 1992...even if there was not official 1992 model year for those either. We also did not get any 1978 SAs...those were all 1979 model year.
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DMRH



Joined: 28 Oct 2005
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Location: Sydney, Australia

PostPosted: Sat Oct 29, 2005 4:26 pm    Post subject: Reply with quote

Blake wrote:
DMRH wrote:
Series-6 = 92-95 actually....... Rolling Eyes


Well, not here. We didn't get *any* 1992 model year RX-7s. While they started selling the 3rd gens in 1992, they were all 1993 model years. And, here again, all the Mazda parts books list 2nd gens as being through 1992...even if there was not official 1992 model year for those either. We also did not get any 1978 SAs...those were all 1979 model year.


Perhaps so but the world doesn't revolve around the American way of altering the factual years on a car.

Here in Oz for example, a 92 model FD RX-7 is actually a 92 model FD RX-7.

In Japan its a 92 model, in NZ its a 92 model, in UK its a 92 model & so on & so on.

Then you guys get those strange double standards get the brain working in whacky mode. USA versions call the 92 models a 93 model. Then they dont call the 95-model a 96-model (lhd exports = 92-95) That one really leaves me laughing at the ridiculousness of it all.......
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Blake
Been there, done that


Joined: 12 Jul 2005
Posts: 135
Location: Portland, OR

PostPosted: Sat Oct 29, 2005 8:36 pm    Post subject: Reply with quote

DMRH wrote:
Blake wrote:
DMRH wrote:
Series-6 = 92-95 actually....... Rolling Eyes


Well, not here. We didn't get *any* 1992 model year RX-7s. While they started selling the 3rd gens in 1992, they were all 1993 model years. And, here again, all the Mazda parts books list 2nd gens as being through 1992...even if there was not official 1992 model year for those either. We also did not get any 1978 SAs...those were all 1979 model year.


Perhaps so but the world doesn't revolve around the American way of altering the factual years on a car.

Here in Oz for example, a 92 model FD RX-7 is actually a 92 model FD RX-7.

In Japan its a 92 model, in NZ its a 92 model, in UK its a 92 model & so on & so on.

Then you guys get those strange double standards get the brain working in whacky mode. USA versions call the 92 models a 93 model. Then they dont call the 95-model a 96-model (lhd exports = 92-95) That one really leaves me laughing at the ridiculousness of it all.......


What is ridiculous is that people take the matter seriously at all, failing to realize that what it "right" is all a matter of perspective. Over here, there was NO 1992 model year of any RX-7 and if people say 1992, they certainly mean the 2nd generation, which spilled over to that year. All "model years" are fictitious, because no manufacturer stops production on December 31s and starts it up again on January 1st with the new model. Perhaps your governmental authority defines what model years are differetly than ours, but it is no less arbitrary than our way. Regardless, the US way may offend you (for reasons I don't quite understand) but it is the way I understand it and I will continue to refer to it thus. Live with it or go away.
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