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RWD4ME
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CARS - RWD Gr 2
September 12, 2012 11:58PM
I have been tossing around the idea of re-entering the rally arena waaay up here North of the 49th.

Gr. 5 was where my interest was in acquiring another car and I was active in the process of doing so until this new rule change.

Seems to me that the RWD options are few with this new rule change. Many of the older cars that are heavy come alive with a turbo but their displacement is over 2.0L.

No sunroof, manual windows, 2.0T, and 2.5NA in RWD.

What are the options?
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HiTempguy
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Re: CARS - RWD Gr 2
September 13, 2012 01:38AM
Quote
RWD4ME
What are the options?

Genesis, BRZ/FRS, RX8 (super cheap now), Miata/S2000/Solstice (don't know if there is a way to make the hardtop legal)? winking smiley

Any rwd corolla, a 2.3L rustang, E30 BMW (looks like a 325i E30 could be a pretty awesome rwd class car now), RX7 (pretty good proven rally platform), MB 190E (rallied in yurope), 240SX (another awesome car for the class? What kind of power can be had out of the truck 2.4L? You could swap a Nissan Skyrine 2.5L inline 6 in eye popping smiley ), speaking of Skyline's, they are stupid cheap in Canada for the base models, so add that, 944, MR2, older poopras came with 4 cylinders, Volvo 240's and 740s...

That's all I got for now!
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fliz
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Re: CARS - RWD Gr 2
September 13, 2012 08:38AM
Viva El Vocho!

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aj_johnson
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Re: CARS - RWD Gr 2
September 13, 2012 09:28AM
Quote
HiTempguy


Genesis, BRZ/FRS, RX8 (super cheap now), Miata/S2000/Solstice (don't know if there is a way to make the hardtop legal)? winking smiley

Cheapest rx8 I could find in my area was 6 grand next was $9500 and they aren't exactly common in the JY. That is what, 800% more than the $750 242 turbo up the street?

Quote
HiTempguy
Any rwd corolla,
Yeah cause those pop up all the time... Hey look the closest one to me is in yakima... 355miles away

Quote
HiTempguy
a 2.3L rustang, E30 BMW (looks like a 325i E30 could be a pretty awesome rwd class car now), RX7 (pretty good proven rally platform), MB 190E (rallied in yurope), 240SX (another awesome car for the class? What kind of power can be had out of the truck 2.4L? You could swap a Nissan Skyrine 2.5L inline 6 in eye popping smiley ), speaking of Skyline's, they are stupid cheap in Canada for the base models, so add that, 944, MR2, older poopras came with 4 cylinders, Volvo 240's and 740s...
Quote
New Rules
Open 2WD
- 2500cc maximum displacement for normally aspirated engines
- 2000cc maximum displacement for turbocharged engines
- 32 mm restrictor for turbocharged engines
- No other significant changes from Group 2 rules

That's all I got for now![/quote]
The MB 190 is most commonly a 2.6ltr I6 wich is out the window. any version of the car with a twin cam is tough to find.

The skyline 2.5 rb25 is turbo, as is rb26 -over the turbo displacement limit. The rb20 Is the only one that fits the bill there,
Not many people rallying rx7's anymore due to the rising cost of rotary rebuilds
944 turbo is over the displacement limit, and you'd be better off swapping the audi 7a into the bay costwise if you wanted a NA.. but that is against the rules too.


the 740 and 240 volvos will work, as long as they are not turbo'd

So your rwd turbo option is: a 240sx with sr20.

well at least it's not a class where only one car makes sense to run.



Edited 1 time(s). Last edit at 09/13/2012 09:29AM by aj_johnson.
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mekilljoydammit
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Re: CARS - RWD Gr 2
September 13, 2012 09:50AM
Quote
HiTempguy
Quote
RWD4ME
What are the options?

Genesis, BRZ/FRS, RX8 (super cheap now), Miata/S2000/Solstice (don't know if there is a way to make the hardtop legal)? winking smiley

Any rwd corolla, a 2.3L rustang, E30 BMW (looks like a 325i E30 could be a pretty awesome rwd class car now), RX7 (pretty good proven rally platform), MB 190E (rallied in yurope), 240SX (another awesome car for the class? What kind of power can be had out of the truck 2.4L? You could swap a Nissan Skyrine 2.5L inline 6 in eye popping smiley ), speaking of Skyline's, they are stupid cheap in Canada for the base models, so add that, 944, MR2, older poopras came with 4 cylinders, Volvo 240's and 740s...

That's all I got for now!

Just shooting the shit - no rally car, though I've put thought into it.

There's a couple SCCA GT3 spec KA24Es (yes, the single cam 3 valve ones) on race-cars.com for 6800 and 6400. Would take running fancy gas instead of pump gas because of the compression, but if you contacted the original builder for rebuild schedules and followed them, should be reliable. Through the restricted carbs they're required by SCCA, they're making prooooobably about 260-270hp at the crank - maybe 300hp on EFI and ITBs. The DOHC one would likely do better and or at better reliability. Either one built like a roadrace engine is going to want a close ratio transmission.

If I was doing an RX-* in a class that required a stock engine (and I think it was said CARS does now) it would be silly to not look at the Renesis - in Formula Mazda trim (which is a sealed stock engine and a standalone with a given map) they're at something like 250hp at the flywheel, with a pretty broad torque curve and is actually a relatively inexpensive option. Original Miata transmission (which is also the non-turbo RX-7 transmission) has close ratio and even dogbox options if you look enough, or even Miata stock ratios aren't that bad (about like the ever-popular T5). The small Mazda diff in some forms (short pinion like 1st gen RX-7s or Miatas) even has available gear and LSD options if you're not doing a Supra diff swap. Or you can throw money at the Duratec - in the last Pro Atlantic trim built by Cosworth, they were making 300hp out of 2.3L, though that's a lot of bucks. Circle track guys probably have figured that out too, and probably for substantially less bucks.

Fords also get the Duratec stuff - Xratty and the like. There's also the Millington Diamond off the shelf - in 2.5L form they do something like 350hp, and seem pretty liked across the pond in rallying. Price is probably even more than the Atlantic Cosworth motors though. Come to that, the Cosworth BDG/BDX in 2L form is up there in power output too - not cheap either, but there's people selling used ones periodically. And speaking of Cosworth, there's a version of the MB190 with a motor developed for DTM/GrA/etc back in the 90s that was around there in power output too.

I'm skeptical of whether any of the ragtop cars would be suitable - at least when I was doing paper builds of potential stuff, it just seemed like too much crap to cram into them even before the question of it was legal came up.

For the fun of it, I'm just touching on stuff that has off-the-shelf engine stuff comfortably past 240hp or so and that is already RWD. The Toyota 4AG engine at that sort of power levels is available, but a hand grenade. Of course, if someone went to the trouble of making a mid-engine thing and/or destroking something (say, a Nissan VQ V6 or Ford/Jag AJ V8) and doing all the development work, they could probably monster any of the options listed thus far - I mean, there's also exotic stuff like the Cosworth DFW for the Tasman series, making around 360hp out of 2.5L in the 60s, or the off-the-shelf Opel DTM V6s up in the 460-540hp range; I know some people have rallied those.

... but of course, the new regs, with their banning of unrestricted turbo motors, will keep power levels and spending in check, right?



Edited 1 time(s). Last edit at 09/13/2012 09:52AM by mekilljoydammit.
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john vanlandingham
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Re: CARS - RWD Gr 2
September 13, 2012 10:03AM
Daniel, this thread is useless without pics---and prices.. Millington at $20-25,000 PLUS ocean freight, install etc..
is probably a skosh out of anybody on this forums range...

Maybe just right for all those oil sheiks up in Alberta



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mekilljoydammit
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Re: CARS - RWD Gr 2
September 13, 2012 10:39AM
I was making a point, John. winking smiley You know, about how rules like this don't actually do anything to reduce costs, and maybe it's not so good that someone with more money than sense (I mean, there's guys like that in roadracing, there have to be at least some in rally too, right?) can buy something that can outrun the rest of the field in what's supposed to be a class for guys to do inexpensive builds and all be competitive with each other. A thinking, intellectually honest person either has to live with that, or say that the little guys still have a chance because HP doesn't matter in 2wd... in which case why the fawk is there rules that try to restrict cheap ways to get power?

Prices... yeah, around 25k for the Millington or the same for the Opel DTM engines. BDG/BDXs seem to go for around 10-35k depending on seller and builder. I'm not sure about the Cosworth Atlantic engines but a new one is probably in the 30k range. Examples of used Nissan roadrace stuff I posted - new KA24DE built to the same specs is probably in the 15k range, there's also ex-factory touring car engines for about that price too. Oh hey, you could slightly destroke a Cosworth XD (couple generation old CART engine) and take off the turbos for about 600hp - new crank and rods to do that wouldn't add more than 5-10k to the price of a 30k engine, right? For one of the Opel motors, take a look at http://www.race-cars.com/engsales/cosworth/1290542526/1290542526ss.htm

I mean, so what if it's completely and totally against the spirit and intent of the rules. Oh, you mean 20-40k into the engine *isn't* what rally people want to pay to be competitive?
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Re: CARS - RWD Gr 2
September 13, 2012 10:22PM
Circle track guys are getting 260hp out of the 2.3 NA with a carb, stroked to 2.5L.
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Re: CARS - RWD Gr 2
September 14, 2012 11:41AM
Quote
phlat65
Circle track guys are getting 260hp out of the 2.3 NA with a carb, stroked to 2.5L.

That setup on an NA 2.3 would be tough to get inspected for street use in NC. Canada amy be different.



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mekilljoydammit
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Re: CARS - RWD Gr 2
September 14, 2012 11:46AM
Going to vary state by state. I know in Wisconsin, if you live in the right county (actually most of the, come to look at it) or the car is pre-OBD2, there's no emissions at all.

Competitive advantage to living in the right place? winking smiley
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fliz
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Re: CARS - RWD Gr 2
September 14, 2012 11:52AM
Quote
mekilljoydammit
Going to vary state by state. I know in Wisconsin, if you live in the right county (actually most of the, come to look at it) or the car is pre-OBD2, there's no emissions at all.

Competitive advantage to living in the right place? winking smiley

You don't have to live in the right county, you just have to store your car "at my place up north". winking smiley
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Re: CARS - RWD Gr 2
September 15, 2012 09:03AM
Chevette (Acadian) with Duratec le5 2.4, head work, cams, and itbs would give upwards of 200 in a 1900 lb car.



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Pete
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Re: CARS - RWD Gr 2
September 15, 2012 09:42AM
Quote
wvonkessler
Chevette (Acadian) with Duratec le5 2.4, head work, cams, and itbs would give upwards of 200 in a 1900 lb car.

I like the way you think, but 200hp is very low. That's barely better than stock power.

One of the Ecotec recepie books has a ~340hp nonturbo Ecotec. It was destroked, too, not a 2.4. They give RPM levels where things need to be upgraded, too - over such and such you need rods, over this you need an oil pump that won't disintegrate, over that you need to convert the chain tensioner to mechanical (drill, tap, nut and bolt, done).

The PDF is on my work computer, but I ran the numbers and figured you could get 290hp before things started to get really expensive due to RPM.



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Edited 1 time(s). Last edit at 09/15/2012 09:43AM by Pete.
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Pete
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Re: CARS - RWD Gr 2
September 15, 2012 09:45AM
Quote
mothra
Quote
phlat65
Circle track guys are getting 260hp out of the 2.3 NA with a carb, stroked to 2.5L.

That setup on an NA 2.3 would be tough to get inspected for street use in NC. Canada amy be different.

Is there a sunset law for older cars?

I drive over-25 cars for just this reason. Breaking in the RX-7's new bridge port engine at the moment. It's way more powerful than the last three bridge port engines I had... or the peripheral port...



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starion887
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Re: CARS - RWD Gr 2
September 15, 2012 10:21AM
Quote
mothra
Quote
phlat65
Circle track guys are getting 260hp out of the 2.3 NA with a carb, stroked to 2.5L.

That setup on an NA 2.3 would be tough to get inspected for street use in NC. Canada amy be different.
You just need to get an address in Columbus county, Matt, or put it in a body older than 1996, and then....ta daaah.... no NC emissions. Stupid EPA ruining rallying....!
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