Idea's For A Time Attack Car

[dmac_25]

Been toying with building a time attack dedicated car for a while now and been looking at a few options and running them through my head.

Seaming that lightweight awd 700hp cars like the cyber evo seem to cut the quickest times at eastern creek and also in japan and the US I'd like to keep those basics without building an evo or wrx and build something different.

My first thought was a R32 gtr as I need a heap of interior parts to finish off my street gtr so that would work well.

I was thinking of doing something different and selling the 26 and building a vh45 twin turbo and make the awd work bit of work but there is just enough room to mount a diff to the subframe and keep the diff and engine separate.

My theory there with the v8 not needing big turbo's to get a nice 600-800hp range and have some nice low end drive out of corners torque.

On the other hand on a big jenny Craig diet with carbon everything they curb at 1250-1350kg.

So was thinking other lighter cars to start off with Silvia came to mind with the same v8 setup but no awd.

Then I started to look at a GTIR and did a little reading and found they have a pretty poor weight distribution of around 65/35 and coments on understeer I'm sort of leaning away from that.

I was even considering ditching the sr20 for a vq30det with a vq40 crank to bring it up to a 3.8 being that a vq isn't that much different in weight to a sr20 but will add a little more to the front.

GTIR came to mind as they start at 1220kg so sub 1100kg should be achievable.

In keeping I'd like to keep it in the Nissan family but did think about TX3 laser and a few other smaller awd cars around the 1100-1200kg mark.

Any thoughts would be greatly appreciated as I wouldn't just want to follow the crowd and build evo as I thought a v8 powered turbo gtr would be something different just think it might be a tad heavy seeing the GTR times at the last time attack.

Cheers David

[Marlin]

Buy an American GT car as a roller, something like the RX8's that run in the series over there. Slot in either a 20B turbo, or a late alloy chev (I'd chose the 7 litre, add no turbos) depending on your personal slant, and enjoy

Hollinger S6 'box would be the go, and it'd be pretty cheap to campaign, with good suspension architecture.

Edited September 22, 2011 by Marlin

[dmac_25]

Cheers mate never thought about us gt cars did think about a v8 supertaxi roller then read the rules and no space frame chassis.

No a chev fan even tho make good power not a fan of chev and to be honest I don't know how they have gotten away with a 2 valve push rod v8 for so long.

And the chicken cookers make good power sound insanse but don't last long enough.

[Marlin]

They've done it for so long because it's proven to make good power and torque for the weight. And weight, my good man, is 90% of making a good race car

[dmac_25]

Yeah for those reasons it's a great engine but for a street engine to pass emissions and now with them in the shit it doesn't look like they will be building an over head cam engine.

Your right weight is the key that's why I'm torn even tho I would like to build a gtr and like them a lot the extra weight is putting more off.

Even tho I do like evo's and would love one it's not different and just following what is already out in front.

[dmac_25]

Yeah for those reasons it's a great engine but for a street engine to pass emissions and now with them in the shit it doesn't look like they will be building an over head cam engine.

Your right weight is the key that's why I'm torn even tho I would like to build a gtr and like them a lot the extra weight is putting more off.

Even tho I do like evo's and would love one it's not different and just following what is already out in front.

[zebra]

Buy an American GT car as a roller, something like the RX8's that run in the series over there. Slot in either a 20B turbo, or a late alloy chev (I'd chose the 7 litre, add no turbos) depending on your personal slant, and enjoy

Hollinger S6 'box would be the go, and it'd be pretty cheap to campaign, with good suspension architecture.

+1 to this.

The Grand Am RX8's are a weapon and come already fitted with a VERY angry NA 20B (think faster in a straight line than 500hp BMW M6s that run in the series too)

[Roy]

Why do you want an overhead cam engine? Less power, more cams/cost etc?

[zebra]

Have to agree with that.

I was looking at building an OHC ford V8, but for half the cost and 50%+ more power its easier to do the good old pushrod ones.

[dmac_25]

Roy the fact that it's a chev and it's becoming the norm just stick an ls engine in it.

True with the more cost but with a set if hair dryers you would get away with a nice re grind of the cams to get up to 700hp.

[dmac_25]

I'm just anti chev been brought up in a ford house

[zebra]

Dave

I can think of 3 or 4 cases of people wanting to drop a VH/VK v8 in a GTR, one mob even started doing it.

None were ever finished, even with a huge budget.

the VH/VK V8s are a very big engine for only 4L, so much so that they would be heavier than a RB.

If you want to be Different than look at getting a rebuilt FR9 or R5P7 Nascar V8, 850+hp on E85, and will last until the end of time in a hot lap car.

Also they are going to Fuel Injection next year, so the likes of Roush/Yates will be doing all the R&D For you

[dmac_25]

That is very true on the vh it's a big engine but a very good engine at that. Just love the idea of a turbo v8 gtr very different.

I did see NASCAR are going efi and in testing which would be interesting.

But again weight is an issue with a NASCAR engine and a gtr when an evo doesn't need much to get it to 1100.

I will be competing next year with our r31 to see how we go so this build needs a bit of planing and thought to which car to pick and which engine to choose.

The other thing in the back of my mind with swapping the engine out is for other classes like improved production etc an engine swap other than a bigger four or bigger 6 won't let the car run in that category so rules it out of a few classes

[benm]

Most of the work is done for you....

http://www.my105.com/ListingDetails/tabid/65/p/3/k/skyline/id/2409/Default.aspx

[zebra]

I thought Stu already sold it?

[benm]

Me too, but it reappeared on there a few months ago...

[zebra]

Easy to figure out...call and ask for Stuart lol

[Marlin]

Ummmmm so I just re read your first post. You're talking 150k on a roller before you somehow retain awd and stick a V8 a Gtr, then next breath talking about a bloody pulsar gtir?!?!

Ahhhhh, budget?

[Risking]

Need a budget and an expectation.

I you want to run at the front your going to need 150k for a chassis if you can't build it yourself (bolt on parts are just not going to cut it) and do you have the talent to drive such a car at 10/10ths....

If you don't have a massive budget forget the Nissan idea all together and build something like the kallis evo.

Minimal outlay (relative to others) easyish to steer and potentially very quick.

You won't get the shits with it trying to chase geometry issues and end up spending 80k to get the chassis competitive.

[Risking]

Cheers mate never thought about us gt cars did think about a v8 supertaxi roller then read the rules and no space frame chassis.

No a chev fan even tho make good power not a fan of chev and to be honest I don't know how they have gotten away with a 2 valve push rod v8 for so long.

And the chicken cookers make good power sound insanse but don't last long enough.

What makes you think a taxi is a space frame chassis.

It's a supercar chassis not a space frame.