LS1GTO Forums banner

1 - 13 of 13 Posts

·
Registered
Joined
·
83 Posts
Discussion Starter #1
Hi :) . Just thought this might interest a few people. I didn't realise that some of you were not real sure on mods for the LS1 engine so I though some might find this helpful for taming that local pesky Mustang or Viper :D . The 427cc 7.0ltr LS1 engine from a Corvette will bolt straight into a GTO. You need to use the sump from the GTO but it will bolt straight in tho. If you have your PCM re-programed, change your diff to a 3.91:1 ratio and use a KAAZ torque LSD. For the T-56 owners you can either have your manual transmisson beefed up and up graded clutch or swap the M12 version straight over. A4 owners you need to have your trans beefed up considerably. The tailshaft will need changing also as some of you are now aware there is a rubber coupling. My advice for you people is have a good talk to a reputable diff/tailshaft shop in regards to this as we have different options over here, but I'm sure you people would to.

Like I said I hope that helps some people out to rid their neighbour hood of blue oval products :D
 

·
Knight Errant
Joined
·
1,800 Posts
C5-R swap

Monaro Aussie said:
Hi :) . Just thought this might interest a few people. I didn't realise that some of you were not real sure on mods for the LS1 engine so I though some might find this helpful for taming that local pesky Mustang or Viper :D . The 427cc 7.0ltr LS1 engine from a Corvette will bolt straight into a GTO. You need to use the sump from the GTO but it will bolt straight in tho. If you have your PCM re-programed, change your diff to a 3.91:1 ratio and use a KAAZ torque LSD. For the T-56 owners you can either have your manual transmisson beefed up and up graded clutch or swap the M12 version straight over. A4 owners you need to have your trans beefed up considerably. The tailshaft will need changing also as some of you are now aware there is a rubber coupling. My advice for you people is have a good talk to a reputable diff/tailshaft shop in regards to this as we have different options over here, but I'm sure you people would to.

Like I said I hope that helps some people out to rid their neighbour hood of blue oval products :D
Just as soon as I hit the lottery mate, a standalone 4L80/85-E with a separate GMPP box behind that motor, the KAAZ differential, and a trip to Connecticut Driveshaft.....for the second Goat... :D
 

·
GTOholic
Joined
·
1,504 Posts
Old Goat said:
Just as soon as I hit the lottery mate...
Let's start a Lottery Pool. Split the winnings. Only requirement is that all proceeds must be used to beef up your Goat. :D
 

·
Member #804
Joined
·
5,539 Posts
thinker said:
Sounds like a tight fit, would be awesome though! Also expensive!
you could concevibly not even notice a 427 (or more cubed) gen III motor under the hood of a GTO. Their are no physical change in size in exterior of the long block.

I've thought about a 409 cubed 6.0 iron block for the goat, back when I learned the GTO was a reality (two years ago) I already started think 427 but the 409 set up is the best budget set up. Just see how people do with the Eagle GEN III cranks that have come out and maybe I will build a stroker. For a while its been only Lunati with a decent gen III crank (big $$$) then Callies now you can get an Eagle crank for under a G note.
 

·
GTOholic
Joined
·
1,504 Posts
Wouldn't the iron block add a lot of weight? Not that it would matter with that much added HP, but every ounce counts.

Also, without a doubt, this kind of upgrade would require a new drive shaft, rear end, and half-shafts, not to mention brakes. From what I've read, the stock stuff wouldn't last a weekend with all that power.

So, bottom line, we're talking big bucks upgrade. Let's refer back to Old Goat's lottery idea. :D
 

·
Registered
Joined
·
83 Posts
Discussion Starter #7
GMH GTO said:
you could concevibly not even notice a 427 (or more cubed) gen III motor under the hood of a GTO. Their are no physical change in size in exterior of the long block.

I've thought about a 409 cubed 6.0 iron block for the goat, back when I learned the GTO was a reality (two years ago) I already started think 427 but the 409 set up is the best budget set up. Just see how people do with the Eagle GEN III cranks that have come out and maybe I will build a stroker. For a while its been only Lunati with a decent gen III crank (big $$$) then Callies now you can get an Eagle crank for under a G note.

It's your money and choice of course, but if you use a cast iron block you will add alot more extra weight to the front end to the point where you will need to make all new front end suspension components as the standard won't be able to handle the sheer weight of the casr iron block. We used to only have a cast iron 304 c.i. EFI 5.0ltr V8 for 10yrs and when GM Holden bought in the new LS1 for the first time it reduced the front end weight by nearly 350lb (190kg). It might be a little more expensive but your best choice would be to use the LS1 block but have it sleeved. After you and everyone else win that illusive lottery of course :D
 

·
Member #804
Joined
·
5,539 Posts
The 304 holden V8 was a great motor, not many outside of australia really know about.

The LQ4 6.0 motor is quickly getting more attention from Fbody owners, and really the weight is a minor trade off and I don't see their any need for aggresive suspension changes. Iron blocks are more durable then alloy and are only $695 from any GM dealer parts dept. (in the states of course.)
 

·
Registered
Joined
·
244 Posts
IIRC (and I may be entirely wrong), they originally came out as 308ci but I think Holden resized them to 304ci to enable the engine to eligible for <5 litre racing categories in Australia (around 1990 or thereabouts). Holden also had a 253 V8 which was short stroke shaft )

Mike

Mike
 

·
Registered
Joined
·
83 Posts
Discussion Starter #11
Yes the 308 was a Holden V8 engine. It was a carby engine also. Due to Group A Homologation racing rules if Holden kept the 308 engine size it would have to compeat against the likes of the V12 Jaguars and the best of the Euopean and American cars etc etc. So in an effort to be competitive Holden reduced it's capacity to a 304, which made the offical capacity about 4998cc, hence enabling it to compete against other cars of similar power outputs and engine displacements. Peter Brock, the Australian god of motor racing and the Holden Dealer Team (HDT) took on the top European cars and won time and time again before the rain of the Supercharged Ford Seirra's in the late 80's.

The 253 was once again a be-stroked Holden V8 carby version. It was commonly known as either the 253 or the 4.2ltr V8.

GM Holden due to the new emission laws passed in Australia for cars made after 1986 that made it compulsory for all cars to use unleaded fuel only coldn't justify the enourmous expense in making the 304 and 308 them compatable with the new emission laws that were also going to com into effect. The Holden 304 EFI V8 was then released in 1989. 165kw @ the flywheel ([email protected]). HSV (Holden Special Vehicles) released a number of hot versions of the 304EFI V8 over the next decade, with the most powerful being 230kw ([email protected]).

GM Holden then swapped to the well known Chevrolet GEN III LS1 and the that's what we have today :)
 

·
Member #804
Joined
·
5,539 Posts
Well turbocharged ford escort Sierras that ran 45psi boost won but also blew a few motors trying.
1987 Brock won the ford sierras were disqualified
1988 Sierras won
1989 Dick Johnson and bowey won in a crappy Sierra
1990 My favorite bathurst, try and find a video of this. For some reason allan grice was outrunning the debuted Nissan Skyline GTR R32 and the sierras fell behind and all blew motors. Grice blew by GTR going down the hill. couple laps later the front running skyline broke an axle. leaving the win for the VL walkinshaw commodore. People say the skyline was such a great car they only ligitimatly won bathurst once and the VN commodore finished second.
1991 R32 GTR skyline won
1992 the race only lasted for about an hour then huge rain storm came in tons of cars crashed including Jim Richards/mark skaife. Richo on the podium being booed for racing a nissan calls the fans a pack of assholes....HAHAHAH The skyline won I guess.

back last year they had the 24 hours of bathurst a nations cup race, and similar to how the R32 Skylines were treated in their time being said how they are so far from stock. The Monaro (pontiac GTO) used an engine out of a Corvette C5-R and out ran porsches for the win.

rest is history.
 

·
Registered
Joined
·
1,068 Posts
Many people booed mark skaif not because of the car but because of his attitude. Although he has improved (a bit) over the last couple of years, many people still dislike his arrogance (reminds me of Michael S in f1). The Nations cup monaro was not the only car running a 7L c5r engine. The monaro didnt even have the biggest engine (8L in the viper). The skylines on the other hand had 4wd, whereas other cars had RWD. FYI the vette that ran with the c5r didnt beat the group 2 porches.

Anyway the monaro was a great idea by ross Palmer. The costs in Nations cup (ross's own money) were growing with cars like lambos, ferraris etc. Ross wanted to have a low cost car i.e. monaro. I guess people didnt like the idea, lots of people wanted expensive ferrari 550's. Procar is dead as a result of europhobes (RIP).
 
1 - 13 of 13 Posts
Top