Does anyone know the proper stroke to get a 305 to 335? 3.480"? 3.500"? Does anyone know the proper rod sizes?

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1986 Camaro
Carbureted 305
700R4

 

To make a 305 a 355 you have to use bore it .30 over and use a 400 crank! You also have to use 3.65 rods (I think) and special pistons and unless I'm mistaken Keith Black is the ONLY company that makes the pistons! With the 400 crank, pistons, and rods the stroke is at 3.76 and when you bore the 305 it makes the bore 3.765 which give you a total over 334.9 cubic inches....hence the 335! Later this evening when I talk to my friend I will verify this with him and post another reply letting you know if what I have said above is "completely" accurate!

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1986 Trans AM
305 TPI
4 Wheel Discs
9 bolt Borg Warner Rear
Completely Stock
Soon to upgrade to a 383 stroker w/TPI, pocket ported 64CC heads, ported intake, comp cam, TPI air foil, Adjustable Fuel Pressure Regulator, possibly bigger injectors!
Current project: Keeping my car running until I get the money for the above mentioned project! :-)

 

Sweet Jesus, does a stock 305 block have the clearance to do this?

I saw an car in Camaro Performers that had a 335 in it. They used a kit, I forget where they got it.

 

Yeah, there's plenty of clearance for this conversion!! There might be other items such as crank bearings that have to be different but when I talk to my friend I will find out all the good stuff!! You're right about the kits.....I'm pretty sure you can find those in a few places! I know a company called PowerHouse out of California sells the 335 kit, complete with the Keith Black pistons! Oh yeah, it's a completely balanced kit too with a new flex plate and harmonic balancer!! Good kit!! The only problem is, they don't have a web site that I've been able to find and I don't have their email address and lost the "magazine" that I got from them! Unless I find it there's no way that I know of to get ahold of them!! If you happen to find them somewhere online, PLEASE let me know!

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1986 Trans AM
305 TPI
4 Wheel Discs
9 bolt Borg Warner Rear
Completely Stock
Soon to upgrade to a 383 stroker w/TPI, pocket ported 64CC heads, ported intake, comp cam, TPI air foil, Adjustable Fuel Pressure Regulator, possibly bigger injectors!
Current project: Keeping my car running until I get the money for the above mentioned project! :-)

 

Do you remember what its price was?

I'm really looking to do something unique with my Camaro and the 396 small block was going to cost way too much.

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1986 Camaro
Carbureted 305
700R4

 

This really needs to be clarified...

For what it would cost to make a 335, you could build yourself a really nice 350 that would easily slap the poor 335 sideways. In the event you still want to do it, a 400 crank will NOT work in an 86 block. You will need an aftermarket crank with 3.75 stroke, usually people use a SCAT crank. I would use 5.7 rods, not the 5.565 used with the stock 400. Pistons are available all sorts of places, not just from KB. This is not just a bolt in deal either, you will run into all sorts of clearance problems. The pan rails need to be clearanced, the bottoms of the bores, various other stuff. Even the cam can interfere, and you get to grind rod bolts and stuff like that. Much easier to just drop in a 350 and not deal with tight clearances everywhere on a small bore block like a 305, unless you want to be unique and have cash you want to burn.

Wild guess, IIRC you are looking at 600-up for the kit at the very least. Throw in money or time clearancing the block. May even have to dent the oil pan some, I have heard of that. In any case, have fun!

 

Powerhouse in Paso Robles CA sell a kit for this.

 

I just talked to my friend about this and I was wrong about the rod size! It IS a 5.7 rod like someone mentioned in a previous post! However, contrary to what he says, I do believe you CAN use a 400 crank in an 86 305 block...it'll just take a little more clearance work!! Also, contrary to what he said, I do believe that KB is the ONLY company that make the 335 pistons! They're special pistons because you can't fit 400 pistons in a 305 block....obviously! But I do have to agree with the guy about being easier to build a 350 than a 335! I will, however, disagree about the extreme deal he made about the cost! When you get up there in the price range a few hundred dollars doesn't seem like that much at all!! B'sides, it's a STROKER engine....even the 383 Stroker will cost you a pretty penny!

To answer your ? about the cost of the kit, I'm not too sure but if I recall correctly it was about $700-$800 but that's completely balanced with EVERYTHING you'd need! My friend told me that he had my powerhouse mag so if you want to email me at pjstar19@hotmail.com ...I will get back to you on the email address of the company and maybe you can get them to send you a mag just to take a look at what they have! Hope this helps out some!

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1986 Trans AM
305 TPI
4 Wheel Discs
9 bolt Borg Warner Rear
Completely Stock
Soon to upgrade to a 383 stroker w/TPI, pocket ported 64CC heads, ported intake, comp cam, TPI air foil, Adjustable Fuel Pressure Regulator, possibly bigger injectors!
Current project: Keeping my car running until I get the money for the above mentioned project! :-)

 

so why not get a 350 block.. unless you just want to have something different

 

The stroke in question is 3.75", same as the 400.

That's $700-800 for the cost of the kit; that doesn't include boring & honing the block, grinding all the places that the block has metal where it wasn't designed to have moving parts; any of the rest of a motor rebuild; etc. By the time you actually get an old factory motor back running again with that kit in it you'll have at least $1800 in it. For that amount of money you could instead spend about half as much building a 350 that will walk all over it. As far as the sort of trouble you will have, there's a guy on this BBS building a 383 (same deal except he's getting the whole bore), and his experience is something you can and should learn from. All sorts of weird unpredictable things have come up in his project. It's not like it comes in the mail and you just install it an afternoon like an open element air cleaner on your TBI.

Bottom line: the whole 335 idea is economically inefficient and only applies to special cases. The only time to go that route is when class rules (racing, car shows, whatever) require that the OE block be in the car. Otherwise you will get a whipping from everybody else that has a 350 and spent less than you getting there, and demonstrate the fallacy for all to see.

There are no factory 400 cranks with the one-piece rear main seal design. That's why you have to buy an aftermarket crank to make a 335 out of a 86-up block. Talk about economically inefficient, when for the $200 it would take to get a 350 block will give you 50 more cubic inches. Like you said, even the 383 will cost, but an ordinary 350 is much cheaper than that (duh), and better than the 335 combo even if not as maxed as a 383.

Then there's always the possibility of not piddling around with any of those little blocks at all, but instead going with the whole thing. Speaking from the point of one who is there, I will tell you that there really is no replacement for displacement.

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"So many Mustangs, so little time..."
ICON Motorsports

 

here's some pistons from summit that i believe would work

STL-H534P30
STL-454NP30



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My `91 Z28 Convertible

 

if you can tell me where to get a 350 for less than 700-800...please email me @
steventhurston@excite.com

 

One more thing to add:

The 350 block and the 305 block are demetionally the same. The only differnce is the bore. They have the same stroke, so if you put a 400 crank in a 305, you'd have the same problems as in a 350. The only difference would be in the clearance of the bore. You'd have to grind more of the 305 away.

Personally, I think that It's a waste of time, money, and resources. Just get a 350!!

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'82 Firebird, dead stock, 9 bolt disc rear, over 200,000 miles and still going strong, more to come...
http://www.spinfrenzy.com/stingerssx...easures.html#4

 

The website for Powerhouse is: www.enginekits.com
and for Big Tex, you can get an assembled 350 short block,(w/good parts) from Hye Tech for just under a grand. There # is (626)575-0053.

 

How are the Hye Tech and Track Pro shortblocks ? I see the ads in the magazines
but have seen no comments on them from this
board. Quality, service, anybody have any
experience with them ?

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Tom K.
84 Z-28 M5 305 L69 HO
pulleys,coil,3:73(stock)
Jet chip, fan switch,
Al dshaft,1.6 rockers,
LCAs and brackets,BFG DRs
14.20 @ 96.74 2.02 60ft

 

I would check those prices closely. Around hear you can get a running 350 from a junkyard for > 500 bucks. Full rebuild kits for 350's are pretty cheap and machine work doesn't cost that much. But thats me.
If you want to be different and build a 335, I think you should do it. I'll take the cheap reliable HP from a 350 anyday.


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82 camaro--original steering wheel, brake/gas pedals, seats--everything else modified
82camaro

 

I agree with the others here who recommend a 350. You should be able to find a reputable machine shop to do a complete rebuild for about $800. Add $150 or so for the core charge and spec it out the way you want (port work, cam etc.). You end up with a 350 for not much (if any) more than what it would cost to stroke the 305.