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Discussion Starter · #1 ·
I'm currently planning to build a 4.6L with a stroker kit for my 95 Tbird and was just wondering if anyone here has done this before. I have already found a 4.6 block from my friends machine shop for $100. Has anyone here built a 4.6 with a stroker kit before and how much would I gain with PI heads and this kit? I found the kit for $899 from the Mustang Depot on Ebay.
 

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our motors already have a long stroke on it. i would bore it out instead of stroking it. you would get more of a power gain with boring than stroking.
 

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this topic has been beat to death if youre gonna build a motor put your money toward head work rather than a stoker set up
 

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the 4.6 has been around over 15 years now...just about every possible topic about it has been brought up, sometimes its ok to bring it up again to get new ideas?
 

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Discussion Starter · #6 ·
I originally wanted to put a 5.4 in my car, but I noticed that I may have some issues fitting the 5.4 in. My headers are already a tight fit with the 4.6. Another thing about the 5.4 I didn't like was that the engine is so much bigger, but it didn't make anymore hp than a 4.6. I was assuming that this was because of the 5.4 intake manifold being made for torque. If I ported the heads, bored the block, and put some good cams in, would a stroker kit be worthwhile? The kit I listed before is pretty cheap. It comes with forged pistons, forged rods, and a nodular iron crank. It actually cost the same as a non stroked kit, so why not go for displacement?
 

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the longer the stroke, the less RPM you'll be able to turn (with everything else the same).......most cams shift the usable RPM range up, and you wont be able to utilize it much with that extra long stroke

do you wanna make top-end power, or low-RPM torque for pullin tree stumps? one of those actually helps wins races...guess which one?

you're right....go for displacement.....but not the kind that reduces your RPM potential.....the more RPM you can turn, while still making torque, the more gearing you can effectively use, and the more torque multiplication you will get at the wheels (due to the shorter gearing)........this can be achieved solely by using an aluminum block and having it bored to 5.0L
 

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Discussion Starter · #8 ·
Thanks for the advice. I'll try to see if the machine shop can bore it out to 5.0L because I want to keep my RPM potential and get more displacement at the same time.
 

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You can't bore it for 5.0 without sleeving all 8 cylinders. IMHO PI intake, good heads and cams is the best route unless you want to go mega high dollar. Get rid of the JBA headers too since their pipes are smaller than the ports in the head.
 

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vegeta1181 said:
Thanks for the advice. I'll try to see if the machine shop can bore it out to 5.0L because I want to keep my RPM potential and get more displacement at the same time.
The only machine shop to talk to for re-sleeving to a big bore is Modular Performance.

Pete
 

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Haven't talked to him in awhile, but Jim O'Neill / Renegade has put together big-bore motors for people on this board, as well.
 

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A 95' 4.6L has an aluminum block?
 

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awdRocks said:
A 95' 4.6L has an aluminum block?
Only the Mark VIII.
JL
 

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The 2007 FRPP catalog has the 5.0 cammer engine block. I can understand if someone does not want to spend the money on it, but why does everyone point out what the 4.6 is and is not? It is not a small block Chevy. It is a modular engine block for the sake of changing heads to make power. It was cast at 4.6 and is not intended to be bored out or stroked. If you want torque, get a 5.4 and supercharge it.
 

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Mr.J said:
The 2007 FRPP catalog has the 5.0 cammer engine block.
most of us know that

Mr.J said:
I can understand if someone does not want to spend the money on it, but why does everyone point out what the 4.6 is and is not?
because not everyone knows the differences

Mr.J said:
It is not a small block Chevy.
most of us know that ..lol

Mr.J said:
It is a modular engine block for the sake of changing heads to make power.
using pistons for higher compression does not make more power in these engines? funny, i thought it did :rolleyes:

Mr.J said:
It was cast at 4.6 and is not intended to be bored out or stroked.
yet, the big bore process was developed, works, and is being used by many people

also, where in the world did you think the "cammer" 5.0 came from? it is a all-aluminum 4.6 that has been bored/resleeved and with 4V heads

Mr.J said:
If you want torque, get a 5.4 and supercharge it.
nah, no thanks......we actually want to go fast in the 1/4 with a lot less hassle than dropping in a 5.4 AND supercharging it
 

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Discussion Starter · #16 ·
I've been doing a lot of research about the stroker kit the last few days. I found that boring and sleeving the block can be really expensive. Also, I've talked to a few people who are really happy with their stroker kits. The machine shop I use builds these quite often and told me the extra torque will be helpful for my heavy car. I know you guys really want me to just keep it at 4.6L, but I just want to try this and see what happens. I'll let you guys know how it works out.
 

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vegeta1181 said:
I've been doing a lot of research about the stroker kit the last few days. I found that boring and sleeving the block can be really expensive. Also, I've talked to a few people who are really happy with their stroker kits. The machine shop I use builds these quite often and told me the extra torque will be helpful for my heavy car. I know you guys really want me to just keep it at 4.6L, but I just want to try this and see what happens. I'll let you guys know how it works out.
Just be forewarned that you shouldn't expect a large power increase from it. You're gonna pick up torque,but you'll be limited on HP by the cylinder heads and the intake manifold much more than a stock stroke 4.6L would be.As long as you go into in with that in mind and knowing it-you shouldn't be disappointed.
JL
 

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vegeta1181 said:
I've been doing a lot of research about the stroker kit the last few days. I found that boring and sleeving the block can be really expensive. Also, I've talked to a few people who are really happy with their stroker kits. The machine shop I use builds these quite often and told me the extra torque will be helpful for my heavy car. I know you guys really want me to just keep it at 4.6L, but I just want to try this and see what happens. I'll let you guys know how it works out.
I'm dragging around 4,642lbs and I can lite up 295-40-20's for about a far as I want. About 30 minutes ago my big bore just layed to rest a 2007 Boxter S, from a rolling start... and my belt is slipping and I see about 4psi max and about .5psi at my shift point, its just a little m90, Big Bores :headbang:
 

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vegeta1181 said:
I've been doing a lot of research about the stroker kit the last few days. I found that boring and sleeving the block can be really expensive. Also, I've talked to a few people who are really happy with their stroker kits. The machine shop I use builds these quite often and told me the extra torque will be helpful for my heavy car. I know you guys really want me to just keep it at 4.6L, but I just want to try this and see what happens. I'll let you guys know how it works out.
you're right about the extra torque down low....it will help move your car much easier in that RPM range.....but once you get into the high RPMs, you will be compounding the existing problem of the shrouded intake valve, which has enough trouble filling the cylinder in even a stock stroke 4.6.....so as JL said, dont expect a hugh power increase, and you wont hate yourself for doing it after the fact.......i for one, dont want ya to stay with a 4.6.....i'd rather everyone had big-bore 5.0 2V or 4V in their ride.....sure more expensive, but you get as much torque as a stroker down low and up top, and will have huge potential for future high-RPM add-ons
 

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Discussion Starter · #20 ·
I just got a call from my machine shop. They ordered the GT 4.6 SOHC block a few days ago and today they received an 03 cobra block instead. They asked me if I would like to keep the 03 cobra block or have them order another GT block. They told me I could have the cobra block for the same price because of the mistake. Now I'm thinking about DOHC heads now:D
 
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