Stroking Chocco's Cross 8 - Fuel Economy Question ??????

[chocco]

Hi All,

Now sometime during winter I will assisting in the stroking of the Cross 8 to 383 during caravan downtime.

This will be a budget build as in no heads or cam(maybe), new springs, etc and as I am not chasing top end but Torque up to 4000 rpm, hopefully no injectors either. A set of Difilipo coated longs will be going on as well.

I guess the theory is more torque less pedal to the metal means less fuel.

Currently at the moment towing I am averaging around 21ltr and not towing around 11.5/12.5 at 100km/h highway, stilll not tuned.

If i am going to get the same or less all good but if its going to go up by heaps well sought of defeats the purpose.

Basically after other people out there with stroked LS1's with their fuel economy figures.

Cheers

[XUV]

you should try a tune first, to at least know what's possible and then maybe a 215 to 218 cam , b4 stroking.

[chocco]

I already know a cam is not going to give me what i want and either is a tune.

Blower or stroking will give me the torque i am after, cannot afford a blower so this is it.

[Micks]

Just my opinion, though would only go down this path if your ride is a keeper? There's no investment in stroking! Also no real point unless considering @ least a baby cam! Otherwise you'll be disappointed!!
I don't reckon your fuel economy will change considerably by stroking if anything with a good tune it should be better as there's less effort to do same job.
Reckon I'd be looking @ heads & cam or some form of FI instead. Less down time & probably better result on the old 5.7L.
I sold my VY & opted for a VZ 6L as I was also looking for slightly more power & a bucket load of torque which I now have
Good luck with it.

[peter b]

Stroking the motor and leaving factory cam will be crap to be honest
You will use more fuel no ifs or bits and to build a stroker with all machining and replacing everything needed will met you around same coin as a blower.
Wouldn't worry about stroking the motor unless you were chasing big numbers in both hp and torque in which would involve heads cam etc.
my opinion put the money into a harrop 1900 blower and be done with it however that is my opinion take it as you wish

[chocco]

Just my opinion, though would only go down this path if your ride is a keeper? There's no investment in stroking! Also no real point unless considering @ least a baby cam! Otherwise you'll be disappointed!!
I don't reckon your fuel economy will change considerably by stroking if anything with a good tune it should be better as there's less effort to do same job.
Reckon I'd be looking @ heads & cam or some form of FI instead. Less down time & probably better result on the old 5.7L.
I sold my VY & opted for a VZ 6L as I was also looking for slightly more power & a bucket load of torque which I now have
Good luck with it.

Thanks Mick,

Yes its a keeper and I am on a tight budget and would not have even entertained the idea had help been offered to do it.

Have done the research with how much torque I should get and where and I wont get that with a cam//tune, remembering I need this torque available from start to 3000rpm and I dont go more than 100 with the van so I need it down low.

If budget allowed yes I would do FI but dont have the money.

Thanks for your advice.

[bozodos]

a small cam should give you that low end torque that you're after, have you had a look at the Comp 212/218 options? Don't know about head options, but could be worth looking into rather than trying to stretch your budget to FI or stroking.

[chev]

Harrop have good deals sometimes. You might be supprised

[Drizt]

Harrop have good deals sometimes. You might be supprised

Do go on

[chocco]

Harrop have good deals sometimes. You might be supprised

When I say tight budget, I mean tight.

Could always take the kids out of private school, then not so tight.

[Souljah]

Trying to do it on the cheap is only going to cost you more in the long run. I can't imagine fuel economy, stroker, towing and tight budget all go in the same sentence.

[Drizt]

Oztrack FE cam sounds like it would be what you are after.

http://www.oztracktuning.com/shop/ca...products_id=88

[duke5700]

You won't save fuel..

It will go faster however.

[swingtan]

If you're towing, want more "go and on a very tight budget, do the diff gears and get it tuned. Actually, I'd probably aim for the following...

1. Decent exhaust: might be a tad tricky if it's used "off road" but certainly worth the effort.
2. Decent intake: Two Hole Mod works fine, don't be overly swayed to pay out $500 for an OTR unless you want the look.
3. Tune: Big changes here to suit the above.
4. Diff Gears: Makes a significant change to how the car drives, especially towing. With an appropriate tune, you won't loose economy.
   
   if the budget can stretch...
   
5. Cam and springs: move the torque range to where you want it. A mid 220's cam with gentle lobes will pick up power without risking longer term issues.

If you got all the work done in a shop, you could probably allow $3K for stage one and the same for stage 2. If you're handy with the spanners and get a bargain in the classifieds, Stage 1 could come down to $1500 and stage 2 to $1000.

Just something else to consider.

Simon

[Souljah]

Do they make front and rear gear sets to suit the Cross 8's?