355 ?'s
I am picking up a 91 355 from another member. But I have a few questions about it. It has center bolt heads.
1) I need an intake for it. Do all SBC intakes fit it? (excluding vortec of course) 2) Same questions for headers 3) Is that motor considered a Gen 1 or Gen 2 SBC? (trying to shop Summit by motor for pricing) Sorry, I am not much for mechanical work. I stay with body & paint usually. Thanks for any help you offer. |
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2. Header should fit anything small block up into the 5.0/5.7 Vortec, just make sure it fits your vehicle and any emission requirements. 3. Those heads are still concidered Gen I. Gen I-All small blocks from the first one till 02 excluding the LTx and the LSx, but does include the 5.0/5.7L Truck engines. Gen II- LTx engines found in mid 90's F-body cars, Caprice, Impalla, Corvette Gen III/IIII-LSx engines found in late 90's-up Corvettes/F-Body Cars, 99-up 1/2 ton and 00-up 3/4-1 ton trucks (4.8, 5.3, 6.0, 6.2L) |
Re: 355 ?'s
Thanks guys. I have no emissions here, so that should be easy. Now, I just need to get the money together to get a decent intake and carb set up. It is all going in my 86 SWB C-10 when I get everything together for it. I may have more motor related questions as I go.
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What do you guys think of the Summit branded intakes? And what size carb should I be looking for? I live around 4800-5000 ft. I have no real idea of how the motor is built. But I know that it is fairly mild.
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Re: 355 ?'s
I usually just enlongate the center 4 bolt holes and use the earlier intake manifold. It works well and I usually have earlier intakes from swap meets laying around. It's all about saving the money to me.
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the carb depends on what you are doing with the vehicle, just a daily driver i would recomend a 600 vacuum secondary. maybe a 650 if you plan on doing a little towing. and wouldnt venture to far from the 650 even if your hot rodding it. the easiest thing to remember for me is this, a engine is a big vacuum pump, the more air you can get in and the faster you can get it out the better it will perform, if you have one part needing air at a different point the engine will struggle to get the air out in wich case you will not be able to make a steady range of power. hope this helps. |
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All you have to do is use a grinder the slot the 2 middle holes on each side of the intake. Here is one I did the lazy way and just slotted them. You don't have to go to the edge of the manifold like I did here. Just but a grinder burr in each hole and hog the holes more vertically. It takes maybe 5 minutes total. After that the intake is bolt on. Be sure and use a good washer under the bolt heads since 4 of them will be sitting slightly crooked now. http://67-72chevytrucks.com/vboard/a...1&d=1061256157 |
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And you don't have any problems seating it like that?
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Never a problem and I have done it a bunch of times. Back about 94, I worked in a Chevy dealership as a mechanic. I used to get warranty core engines and go through them and put them in older vehicles doing exactly this thing.
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Awesome! Then I guess I am on the look out for an intake. Got $50 for some parts today so that will help. Thanks again for the help. :metal:
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Hey, Gerald:
Here's a pretty good history of the SBC from "Chevy Hi Perf." Also: If you really want to play with an older (80-85) non-perf oriented intake (SN 14057053), you can have mine, gratis. Lemme know if you really want it & I'll send it out ground & cheap, just happy to get it out of the basement. It needs to be cleaned out, was painted black (partially wire-brushed), needs to have the oil splash pan re-attached (not a big deal), but it is free to your door. -Todd |
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Todd,
That link was great, thank you. The intake you have is just a stock one? I appreciate the offer a lot! I don't know...would it be any different than the stock one I have on my current 350? But, If it would be a decent intake for me I will take you up on that. And then I think I will save to get a nice Edelbrock to help get a little more out of the motor down the road. At least I think that would be a pretty good help. |
Re: 355 ?'s
I think I might have stumbled across an intake here local. A fellow board member has a Holley Street Dominator hi rise. Would a high rise like this be overkill for this 355?
http://i68.photobucket.com/albums/i2...3/IMG00467.jpg |
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From what I can tell a single plane high rise intake is not going to have a good power band for my little motor. Looks like its power is way up in the RPMs. Is that true?
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wayyy too much intake for a stock motor or even close to stock. You want to look at a performer or performer rpm at the most.theres lots of similar intakes from other brands as well. i have seen them selling on craigslist as cheap as 50 bucks lately.
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Thank you! That is what I thought. Another forum member has a Weiand 8004 model intake and a Carter 600 carb that I think would work great for my application. I am looking into that further.
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Thank you again. The offer was very gracious. I plan to sell my current 350 as a complete motor when I gather the parts for this 355. Thus, I wont pull the stock intake off for the new one, so if I do not get the Weiand I am looking at I will take you up on the offer. I should know within the weekend about that one. And again, thank you a ton! It really made me realize why I have enjoyed this place so much.
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