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302 Top End Rebuild - yep, another one!
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XR9UTE
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PostPosted: Sun Mar 30, 2008 12:30 pm    Post subject: Reply with quote

Nah you could get away with 6-8lbs the way it is. You should get near 400hp at the treads with what you have icon_biggrin.gif
Just run it like that and build another tough short block up for it in the meantime.
Actually you may be lucky and find you have a forged piston bottom end already in which case you'll be able to push 10lb with ease. Next time you do an oil change have look up the drain plug hole at the underside of the pistons and let me know how it looks...the cast pistons look quite deifferent to the TRW forged ones. It seems luck-of- the-draw as to which engine you end up with. Mainly it's early pre-92 engines that had them because they switched to hyper pistons mid-92 in the U.S. However I've had a few engines that came out of cars as late as EF that are forged. Recently I picked up an EF engine for $300 that is forged and an NL engine for $600 that is not but I've seen EB engines that are not too. So it's a matter of where the engine came from the U.S. stockpile it seems.

Pete.
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schnoods
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PostPosted: Sun Mar 30, 2008 12:56 pm    Post subject: Re: blower Reply with quote

MICKYYYY wrote:
Blower option sounds awsome

With the kit from summit which side of the engine bay will the blower sit? on the battery side or air box side of the engine bay?


Only seen the Mustang kits on the Battery side.
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XR9UTE
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PostPosted: Sun Mar 30, 2008 1:24 pm    Post subject: Re: blower Reply with quote

schnoods wrote:
MICKYYYY wrote:
Blower option sounds awsome

With the kit from summit which side of the engine bay will the blower sit? on the battery side or air box side of the engine bay?


Only seen the Mustang kits on the Battery side.


Perfect opportunity to move the battery to the boot. The vortech bracketry is much better than the crapa stuff too.
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Scaffy
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PostPosted: Sun Mar 30, 2008 1:35 pm    Post subject: Reply with quote

And I'd then be able to have trick flow facing the right way up on my intake! icon_smile.gif

What should I be looking for on the bottom of the pistons?
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XR9UTE
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PostPosted: Sun Mar 30, 2008 1:42 pm    Post subject: Reply with quote

Scaffy wrote:
And I'd then be able to have trick flow facing the right way up on my intake! icon_smile.gif


Yeah! or just grind it off anyway. You'll have to mod your engine harness(or just get a mustang one and plug it in) and muck with your fuel rails a bit but so what? Been there, done that icon_biggrin.gif
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Steady ED
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PostPosted: Sun Mar 30, 2008 2:42 pm    Post subject: Reply with quote

Hey Pete, what are the chances of a '93 XR8 Sprint having the TRW forgies?
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XR9UTE
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PostPosted: Sun Mar 30, 2008 2:59 pm    Post subject: Reply with quote

Steady ED wrote:
Hey Pete, what are the chances of a '93 XR8 Sprint having the TRW forgies?


About as much as any other. I've seen three sprint engines in bits and they were all cast. Doesn't mean yours is though.
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Steady ED
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PostPosted: Sun Mar 30, 2008 3:00 pm    Post subject: Reply with quote

I'll have to grab some pics when I've got the sump off doing the oil return for the blower.
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MICKYYYY
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PostPosted: Sun Mar 30, 2008 5:11 pm    Post subject: blower Reply with quote

for the price of the blower i think its the way to go.

Think about the gilmer drive sound u will have and power and torque on tap mmmmmmmmmmmmmmmmmmmmm im teasing myself too LOL

1 thing i think of is how reliable are blowers in general and imparticular the summit kit???
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XR9UTE
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PostPosted: Sun Mar 30, 2008 8:57 pm    Post subject: Re: blower Reply with quote

MICKYYYY wrote:
for the price of the blower i think its the way to go.

Think about the gilmer drive sound u will have and power and torque on tap mmmmmmmmmmmmmmmmmmmmm im teasing myself too LOL

1 thing i think of is how reliable are blowers in general and imparticular the summit kit???


No gilmer belt, it uses a serpentine belt and the blower is an SQ trim. SQ means "super quiet" because it has helical gears in the box. If you want loud get one of their straight cut geared examples and fit a toothed belt. Thing is the SQ has a stronger gearbox.
Centrifugal blowers are very reliable if you don't overdrive them and run a good air filter. Summit only sell the kit which is made by Vortech themselves so, it's the best quality. Another place to try is superchargersonline.com.
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MICKYYYY
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PostPosted: Sun Mar 30, 2008 10:30 pm    Post subject: blower Reply with quote

If i were to go blower id like to have the gilmer drive sound but dont want to compremise on reliabilty of course.

Ive heared some blown engines and they sound SICKKKKKKKKKKKKK!!!!
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BOTTLEDUP
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PostPosted: Mon Mar 31, 2008 11:25 am    Post subject: Reply with quote

Have you got another block lined up? I can't see the standard one tolerating 500rwhp for any decent length of time.

Richard Leeson's XH (Marks Workshop) was originally running a very similar setup to what you are looking to achieve. Even with the Ford Racing Sportsman block, girdle and a forged rotating kit 507 was the practical limit before he again ran into block problems. This has now been rectified with a DART Iron Eagle.

Do your sums and if you want a genuine reliable 500+ at the treads factor a block and 4340 forged rotating kit into the equation. Dart Sportsman blocks are pretty well priced at the moment, you could have one on your doorstep for around $3K.
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MICKYYYY
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PostPosted: Mon Mar 31, 2008 5:46 pm    Post subject: blower Reply with quote

I remember seeing a crap load of under bonnet supercharges on ebay.com

I carnt remember the store name but it was from america and this guy had blowers for everything and all different kits too.

I had a search on ebay but he is no longer there unfortunatly icon_sad.gif
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Scaffy
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PostPosted: Mon Mar 31, 2008 6:15 pm    Post subject: Reply with quote

BOTTLEDUP wrote:
Have you got another block lined up? I can't see the standard one tolerating 500rwhp for any decent length of time.

Richard Leeson's XH (Marks Workshop) was originally running a very similar setup to what you are looking to achieve. Even with the Ford Racing Sportsman block, girdle and a forged rotating kit 507 was the practical limit before he again ran into block problems. This has now been rectified with a DART Iron Eagle.

Do your sums and if you want a genuine reliable 500+ at the treads factor a block and 4340 forged rotating kit into the equation. Dart Sportsman blocks are pretty well priced at the moment, you could have one on your doorstep for around $3K.


I've been looking at the new Ford BOSS block. I've been told it'll be up to the task. I'm not interested in exceeding 500rwhp as I still want to be able to drive it on a daily basis. I'm still undecided as to what I'm going to do. I may end up buying another house soon anyways which will mean my car remains as it is for a while to come icon_sad.gif
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BOTTLEDUP
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PostPosted: Tue Apr 01, 2008 11:19 am    Post subject: Reply with quote

For the price of a Ford BOSS block you'll get a DART sportsman, don't overlook all your options icon_smile.gif


IMO hold off the house for another 8-16 months, wait for those interest rates to fall off a bit. icon_wink.gif
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Scaffy
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PostPosted: Wed Apr 02, 2008 6:49 pm    Post subject: Reply with quote

The interest rates aren't a big issue for me. Just got my eye on a couple of places that have been on the market for a while. If one of them is willing to drop the price to what I want to pay then I'll grab it and enjoy the interest rate decreases when they come. But hey, this isn't housemods.com so I'll stop talking about houses icon_biggrin.gif

As far as the block is concerned, when it comes time to me actually purchasing something, I'll start seriously talking to some people and work out what will be best for my application. You'll probably be hearing from me a lot around that time Dave.

On another note, hopefully in a couple of weeks I'll be trying to get down to the motorplex again, as the nights are getting considerably cooler, and see if I can drop that 13.9 to a 13.8 or even a .7. I'd like to get a bit further away from the 14...
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Scaffy
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PostPosted: Thu Apr 17, 2008 5:35 pm    Post subject: Reply with quote

Well, I went down this Monday again to see if I could better my time, of 13.978. I did, I got a 13.976! It looks like 13.976@101.12mph with a 2.25 60 footer will be it for now. I broke out on that run though by an atom, -0.001.

After my first run, I thought it was all over. At around the 60' mark my clutch decided to slip like f**k and leave me standing still whilst the engine revved its tits off. I eased off and it engaged again and we went off on our merry way. I lined back up after that, expecting to have problems off the line, so took it really easy on my next couple of runs. I got a couple of 14.3s and the clutch wasn't causing any more problems, so I thought I'd gradually give it a bit more off the line. I eventually got it down to a couple of 13.9s in a row. After that though, every run I had started with wheelspin. I think I was too scared to let the clutch slip much more, but ended up with 14.0s and 14.1s for the rest of the evening. I got 11 runs in which is more than I've ever got down there on a Wednesday night. If it weren't for the HSV Owners Club, the Supra CLub and the R31 Club, there wouldn't have been many cars there at all.
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ozrunner
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PostPosted: Thu Apr 17, 2008 9:41 pm    Post subject: Reply with quote

Scaffy wrote:
I've been looking at the new Ford BOSS block. I've been told it'll be up to the task.
Scaffy, a word of warning.

If you intend to also stroke it to 347 someday then DON'T go for the new Ford Boss block icon_sad.gif

JD
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Scaffy
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PostPosted: Thu Apr 17, 2008 9:59 pm    Post subject: Reply with quote

Nah? I've read they've been stroked to 363...

I'll keep taking on any info anyone's got.
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ozrunner
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PostPosted: Thu Apr 17, 2008 10:38 pm    Post subject: Reply with quote

Your call but my advise would be to at least wait for hopefully a version 2 that rectifies a MAJOR design floor icon_rolleyes.gif
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