3rd Gen / L98 Engine Tech 1982 - 1992 Engine Related
View Poll Results: 400hp 305 or stock LT/LS-1 that in the lengthy-future will be modded?
Keep building up your 305; (I know I can hit 400+hp w/ a few simple yet costly mods )
16.67%
Snatch an LS1 or LT1 and build that up in the future.
70.83%
Grab myself an entire LS1/LT1 *car* and build that up in a LONG time
12.50%
Multiple Choice Poll. Voters: 24. You may not vote on this poll

Which do I do? 400+hp 305 or drop in an LT/LS1

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Old Jul 22, 2005 | 10:39 AM
  #31  
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Re: Which do I do? 400+hp 305 or drop in an LT/LS1

I have also seen it, not that big of a deal. We are actually swapping a carbed LT1 into a 87 IROC as we speak...its fired and moving just having some clutch issues. Also swapped one in a friends 69 camaro til his BBC was sone. Ran great.

Kyle
Old Jul 22, 2005 | 12:31 PM
  #32  
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Re: Which do I do? 400+hp 305 or drop in an LT/LS1

Originally Posted by 89385formula
If you used a T56 it would use the same driveshaft your T5 uses. LS1 rear is really not any stronger than your 10 bolt, its the same thing with a different differential. Next is stock wheels will fit over rear LS1 brakes.
I made a thread a while back and I am pretty positive that the stock 15's wont fit in the LS1 brakes

Originally Posted by blackztpi
well, i'd like to see a 305 that makes a streetable 405 hp....
Me too

Originally Posted by 89385formula
Just curious why everyone seems to think the LT1 swap is so difficult?
I am deathly affraid of fuel-injection

Last edited by 85_305; Jul 22, 2005 at 12:34 PM.
Old Jul 23, 2005 | 07:11 PM
  #33  
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Re: Which do I do? 400+hp 305 or drop in an LT/LS1

I want to see you do it, but lets put the challenge a little higher. It sounds like you want to keep things streetable, so don't go with a huge camshaft. That is the biggest mistake that beginners make. I have always thought it could be done with a modest cam and the right parts. You will also have to pay attention to detail when building your bad *** 305. I suggest you look into Smokey Yunicks book on the small block chevy performance. There are so many things that the common engine builder misses that can worth a lot of power. These things do take a lot more time, but you will be pleased with the results.

I know you don't like efi, but there are a lot of advantages with streetability. Don't get me wrong. A good carb tuner can do a lot of things, but you will be under the hood once a week tuning the carb.

We have messaged earlier today on a different thread and you know how much I like to do things that others say can't be done. So, good luck and happy to help

Austin
Old Jul 23, 2005 | 08:08 PM
  #34  
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Re: Which do I do? 400+hp 305 or drop in an LT/LS1

Thanks for your input dahaus, and thank you for voting My camshaft is deffinently not "HUGE" as many use, but it is deffinently not SMALL either. I relize that there is TONS more tunability/driveabilty w/ using EFI, but I do not know how to play with it and neither does my hot-rodder friend that has been helping me out so-far. There are SO MANY things that I can think of off the top of my head right now that if I had perfected from scratch I would be making more hp, but I figured that soon-enough they will be swapped out for better parts anyways so I am not worried about it.
Old Jul 23, 2005 | 09:29 PM
  #35  
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Re: Which do I do? 400+hp 305 or drop in an LT/LS1

Originally Posted by 85_305
My camshaft is deffinently not "HUGE" as many use, but it is deffinently not SMALL either. I do not know how to play with it and neither does my hot-rodder friend that has been helping me out so-far.
Cmon man, you gotta keep it under a PG13 rating here.
Old Jul 23, 2005 | 10:01 PM
  #36  
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Re: Which do I do? 400+hp 305 or drop in an LT/LS1


Very clever
Old Jul 25, 2005 | 01:21 AM
  #37  
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Re: Which do I do? 400+hp 305 or drop in an LT/LS1

Hey I don't mean to hi jack, but I noticed your from the Western New York Area

I am the founder of wnyfbody.com
you should come and check us out, currently have 199 members
Old Jul 25, 2005 | 06:11 PM
  #38  
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Re: Which do I do? 400+hp 305 or drop in an LT/LS1

I am a designated 305 hater and you know this, I have stated before that I believe you may be able to get 400hp out of a 305 but I think you will twist the crank, not to mention having spent way more than you would have if you just built a 350 in the first place. but F-it build the 305 and a few months later, if you havn't blown it up, post it and laugh in my face.
Old Jul 25, 2005 | 11:41 PM
  #39  
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Re: Which do I do? 400+hp 305 or drop in an LT/LS1

Lynk, I'm not sure why you would think you would "twist the crank". The bottom end of a 350 and a 305 are pretty much the same, except for the size of the piston. And when I say pretty much, I mean the only thing different is the rods are little lighter built and the balance of the crank is for a lighter rod and piston. You can put 350 rods in and the bottom end is as strong as the 350.

Yes, you will put more money into the 305. This is true. But, the motor will have just as much chance of living as any other.
Old Jul 26, 2005 | 12:09 PM
  #40  
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Re: Which do I do? 400+hp 305 or drop in an LT/LS1

Originally Posted by SLOW84TA
Hey I don't mean to hi jack, but I noticed your from the Western New York Area

I am the founder of wnyfbody.com
you should come and check us out, currently have 199 members
Hey, no way?? Where are you guys located? I am 30-miles south of Buffalo
Old Jul 26, 2005 | 03:10 PM
  #41  
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Re: Which do I do? 400+hp 305 or drop in an LT/LS1

honestly if you have a carbed car just leave it carbed.

You can easily make just as much power, just stroke out a good 350 block, get some half descent heads ported by a good place, cam intake and carb. Theres your 400 hp easy. If you already have efi theres no reason to get rid of it. But its so much more of a headache and without enough gain to justify it for your average street driven car.
Old Jul 26, 2005 | 03:30 PM
  #42  
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Re: Which do I do? 400+hp 305 or drop in an LT/LS1

^Ya, I feel the same. My car came w/ Carb, so it's staying car (unless I put in an engine that's already EFI). Although I *would* like the fuel-efficiency gain from EFI
Old Jul 26, 2005 | 09:29 PM
  #43  
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Re: Which do I do? 400+hp 305 or drop in an LT/LS1

for the money that you would spend on an EFI 350/383 you could build a stroked 400 block with a carb. enough said
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