I origanally planned on using this 305 I have for a Camaro because of the gas mileage. Now I have decided to stroke is and put more power into it. I already have a parts list planned out courtesy of my garage at Summit. Can I just drop in the crank from a SB 400 without any machining? Also do I need the beraing for a 305 or 400? I know I will be stroked to a 327 and I need 327 pistons. Can I still use the H-Beam 305 rods I have? Wil using the 400 crank raise or lower the compression? One more thing (sorry). I can still use all of the external 305 parts and along with the Cam and heads I plan on useing without problems right? I'm getting Dart complete heads with Summit roller rockers and the Comp cams hydraulic roller retro-fit with a 218* lift and Comp Cams roller lifters. Oh one more, I want to raise my compression a little and I plan on using 9.2 pistons, can I go a little higher and use pump gas? How should I do this, these Pistons I'm using on go up to 9.2. Thanks for all of the help. I'm learing lots!

Nick

 

Let me be the first to tell you, DO NOT build up the 305! Just go to a junkyard and snag a 350, rebuild it and your troubles will be over! I hope this cleared somethings up and helped. Or, even better, just buy my car!

 

Put it this way, I have a 350 and a 455 from a 67 GTO at home, I'm doing the 305 because everyone told me not to. Someone please help me out.

Nick

 

Thats all the more reason to not build the 305....

 

i wish I had money n time to blow on something but I would least blow it on something that would pay off in the end.

 

well, again the 305 will cost you more to build and have less power but, to your question I assume you are using a 91 305? you could buy an adapter plate to use the 400 2 pc rear main in the 1 pc rear main block but, then the 400 crank needs to be turned. or you could buy a scat strocker crank for the 1 pc block and save money there which would be a lot cheaper and a lot stronger. then you need to get special pistions for you 5.7" rods.the 400 rods are too weak and going through all this trouble you might as well use the better rods. oh and have a good machine shop balance it as the 305 is a little differant than the 350

 

just go to flatlander racing. com or somewhere else and get a stroker kit for the 305. It will have the rods and pistons tailored to the compression ratio you would like to run.

Don't listen to these guys, build that little 305 stroker and smoke thier butts. It is easy to build a 350 or a 383 like everybody else, why not try something different. The 305 will be just as cheap to build as the 350. You will not have the cubic inches like the other people do, so it will cost you more to make more power, but the cost of a stroker kit is the same as a 383 kit. The cost of a camshaft is the same.

If you build it, they will come!!!!!!!!!!!!!!!!

 

This would be a key factor to me.....If you have tons of time and money to do something just to prove a point...Its your world!!

 

well, show me some pistion prices same brand and type vs each other every one I saw was cheaper for the 383 but, hey prove me wrong maybe more will do what your doing

 

the small bore long stroke thing does make fuel milage nice. i wouldn't use a 400 crank though. i'd use a new crank.

 

Everyone, who cares if he builds a 305 and 350? I mean, I want to build a fast 305 just to build one because everyone says it can't be done. But I hardly got the funds for a waterpump and cat-back exhaust. I can't do it on my current budget (dang high school budgets.) 305 blocks are cheap. I'd have it machined, forged bottom end, good top end, put a supercharger or customize a twin turbo setup on her, and let her rip! If he wants to build a 305, let him. It would be quite fun. As for the 9.2 compression ratio, yes you could go higher. I'd say MAYBE you could get by 10:1 on 93 octane. Someone back me up on that call.

 

A 350 can be stroked to a 383 using 400 rods and I'm pretty sure that allows the use of 350 pistons cause the 400 rods are shorter.
The same would apply to a 305 stroked to a 327 since you're replacing a 3.48" stroke with a 3.75" stroke.
I'm just going by something I read a long time ago, hope I'm not totally out in left field on this.

 

wrong, 400 rods are 6.00 while 350 rods are 5.7 and you cannot make a 305 into a 327, it has a different bore i think it was, but also the journals are different for the most part, they are the same as the 350's.

 

A 305 with a 3.75" stroker crank has a displacement of about 327ci, and while it isn't THE 327, it will be a 327. Or maybe a 331...
As for the rod length, 5.565 is the factory rod length for a sb 400.
And a little homework has also revealed that the part# for the std 350 piston is the same as the part# for a 383 using 5.565" rods. So that would mean that using the 305 pistons with 5.565" rods and a 3.75" stroke is one option for building a stroker.
Assuming that you used the same design piston and heads in the 305 as your 327, yes the compression would be increased in the stroker.
Another option would be to use 5.7" rods and order a set of pistons with a shorter pin to deck height. Check the KB or Speed Pro site for availability on those.
I might actually try something like a 327 stroker for a lugging truck motor, it'll probably make some pretty good torque in the 1500 to 3000 rpm range and give a noticeable improvement in fuel economy with the right gearing etc.
Good luck with that.

 

If your gonna do it...do it right. Here is a link to a quality 305 stroker kit with everything you need. Crank, rods with the proper machining for clearance, Keith Black Pistons, etc. It cost $600, about $150 more than a similiar 350 build kit of the same quality. Go with some Vortec heads and associated parts (dedicated manifold, gaskets, bolts, etc.), call Comp Cams for the cam they would recommend and I think you'll be happy.

http://www.enginekits.com/index.html

 

Your kidding, right? 400 rods are 5.65" to keep them from going over the deck with longer throw of the 400 crank.

 

I stated all of this above , I suggested using the 5.7 rods for strength. the 400 rods are weaker and since he wants to make some real hp the stock 400 rods just won't cut it. and he can buy the special height stroker 305 pistions since money is no concern. or he can buy the higher performance rods for a 400 but, I think it will jack up the price there too. thats why I asked him to show some prices for them I would like to see just how much this stroker will cost. I don't hate the 305 infact mine halled I was always told "thats a 350 not a 305" , people are still going to think its a 383 no mater what I guess it will be an inside joke then right