Dyno on the V8 RX-7

[Baka Sama]

So I finally got a chance to talk to my bro. about the v8 rx-7. At the dyno it came in at 260hp and like 340ft lbs of torque. Not bad but he said the lack of power was because he had the stock heads on the chevy engine. He plans on adding aftermarket ones soon and it should at least be putting down mid 300 hp. At the dyno he said he saw a mustang saleen (or however you spell it) with only a few mods putting down almost 400hp. And a Honda s2000 with 180hp (not bad) but.... not even 140ft lbs or torque. &nbsp; <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/laugh.gif" border="0" valign="absmiddle" alt=':laugh:'> That?s Honda for you.

[anisht]

umm....he took out the rotary engine....and put in a v8? &nbsp;

seems somewhat backwards to me. &nbsp;but i just think rotarys are hella cool, so maybe its just me.

[Baka Sama]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (anisht @ Oct. 28 2002,2:17)</td></tr><tr><td id="QUOTE">umm....he took out the rotary engine....and put in a v8? &nbsp;

seems somewhat backwards to me. &nbsp;but i just think rotarys are hella cool, so maybe its just me.</td></tr></table><span id='postcolor'>
yes they are. But turbos are expensive to maintain. Anyway...thats him not me.

[AKADriver]

The rotary is smooth and small, but it's not light nor very powerful, really, and due to their delicate nature there are tons of RX-7s sitting around with dead or dying engines.

So what's better, a dead rotary or a healthy V8?

An FC with a typical aluminum-head pushrod V8 will easily outaccelerate a stock or mildly modified FC, and easily outhandle the engine's donor car. &nbsp;It's a proven combination.

[Kreator]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (anisht @ Oct. 28 2002,2:17)</td></tr><tr><td id="QUOTE">umm....he took out the rotary engine....and put in a v8?

seems somewhat backwards to me. </td></tr></table><span id='postcolor'>
lol
There's no replacement for displacement. rx7 is a great track car, but rotary engines and most other turbocharged engines that came in japanese cars aren't the best for drag. If you wonna go fast in a straight line fast, a v8 is a way to go.

[red240ne]

it just doesn't really seem right though. &nbsp;why go from a light japanese engine to a heavy ass gas guzzlin v8?? &nbsp;it doesn't seem like the rx-7 would handle very good after that. &nbsp;what did he put in? a 350?

[RacerBoi]

A 13b and a 350 aren't that different in weight all things considered. The 350 engine mounts are only something like 400 dollars. People put 350s in fieros too. Light car + powerful engine = low qt mile time. I wouldnt want one for a daily driver though.

[Kreator]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (red240ne @ Oct. 28 2002,2:52)</td></tr><tr><td id="QUOTE">why go from a light japanese engine to a heavy ass gas guzzlin v8??</td></tr></table><span id='postcolor'>
So he could run 9s all day long on pump gas for half the price it would take to make the rotary get there? It'll handle worth shit, but in a straight line it'll be damn fast. Plus imagine the look on people's faces when u pop the hood &nbsp;<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/inlove.gif" border="0" valign="absmiddle" alt=''>

[Aze85]

first off, rx-7;s are pretty good drag cars. &nbsp;A 400hp rotary can push the rx into the low 11's no problem. sure it does suck to fine tune the 13b, but its worth it. &nbsp;its true that there is no replacement for displacement, unless you can cram a huge turbo under your hood and not detonate.
Y would you put abig block V8 into a rx7. I just dont undetstand &nbsp; <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/crazy.gif" border="0" valign="absmiddle" alt=':crazy:'> . It's so unjapanese and it would take away the perfect weight distribution. 13b's ARE lighter.
oh well, i guess its unique and original <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=''>

[LanceS13]

Well, a 350 is a small block...not a big block. And why would you want 400 turbocharged HP putting you in the 11's, when you could have over 500 n/a HP for the same or less money getting you in the 10's? As long as it's a drag-only car, who cares about the weight distribution (although, I bet it's still better than alot of cars out there, especially if it's mounted as far back as possible, the battery is relocated to the trunk, and stuff that isn't needed for racing like a/c and emissions stuff is removed from the engine bay...but that's just speculation). Sounds like a winning combo to me, if executed right....big torquey engine in a lightweight chassis can make for a crazy power/weight ratio. A car with more than twice as many cc's in the engine than lbs. in the chassis is an instant novelty in my book.