305E Intake mod.

[TJ's GMC]

Originally Posted by kchampagne

Wow, that looks fantastic! I want to do that now! Great work!

Thanks! Sorry the pictures won't show up...waiting on admin to fix them. lol

[TJ's GMC]

Ok....trying this picture upload once more. lol

[TJ's GMC]

We have a running and driving video! Had no one to hold the camera while I was driving so I couldn't do a fast run....tried but failed. lol

https://www.youtube.com/watch?v=Gjpfx4YZzoY

[TJ's GMC]

Been driving Crustine everyday to work and back and so I thought I'd do a review:

So, a stock 67 305E engine was advertised at 152 hp and 280 torque(?). That's with a small 2 barrel and small single exhaust.

My 1st step was a 600 cfm edelbrock adapted to my 305's 2 barrel intake using and old MR. Gasket 4 to 2 adapter. I figure about a 20 hp and 15 torque increase. Also a little more mid-rang and top end. But to much carb for single exhaust. So about 172 hp and 300 torque.

2nd step was dual 2.25 exhaust with flowmaster 40 series mufflers and 2.5 tail pipes. An increase was also felt with that as well....bout another 15 hp and 10 torque. So estimated power from last would be 189 hp and 310 torque.

Now the final. Scouted a 351M intake and milled it out. And again I felt a rather Large increase....I'm gonna say another 25 hp and 15 torque because it was noticeable. So 214 hp and 325 torque now after the manifold mod.

Could I be to high? Probably....but that motor is producing Much more power than before. And it's the baby!

Little more review......
Starting is Super easy. Two pumps of the gas and full choke...half a turn and it's sitting at a 1000 rpm warm up idle. I normally push the choke in to let it warm up at 700....anyhow, starting is effortless. Cold idle is 500 warm is 700.

Did do a plug check and plugs are burning the fuel nicely.

So was all this worth it for a 305 V6? I think so. The power increase justifies the work involved in my opinion.

And Yes a Magnum intake will bolt directly onto non-magnum heads. You will want to use 305 intake gaskets though.

Well that's it guys! Anything else you wanna know just ask....I think next I'm gonna make headers or try some magnum manifolds. I need a stinkin dyno!

[bigblockv6]

Stock figures for the 67 305E are 157 net hp and 263lbs ft torgue

[bigblockv6]

Originally Posted by TJ's GMC

Been driving Crustine everyday to work and back and so I thought I'd do a review:

So, a stock 67 305E engine was advertised at 152 hp and 280 torque(?). That's with a small 2 barrel and small single exhaust.

My 1st step was a 600 cfm edelbrock adapted to my 305's 2 barrel intake using and old MR. Gasket 4 to 2 adapter. I figure about a 20 hp and 15 torque increase. Also a little more mid-rang and top end. But to much carb for single exhaust. So about 172 hp and 300 torque.

2nd step was dual 2.25 exhaust with flowmaster 40 series mufflers and 2.5 tail pipes. An increase was also felt with that as well....bout another 15 hp and 10 torque. So estimated power from last would be 189 hp and 310 torque.

Now the final. Scouted a 351M intake and milled it out. And again I felt a rather Large increase....I'm gonna say another 25 hp and 15 torque because it was noticeable. So 214 hp and 325 torque now after the manifold mod.

Could I be to high? Probably....but that motor is producing Much more power than before. And it's the baby!

Little more review......
Starting is Super easy. Two pumps of the gas and full choke...half a turn and it's sitting at a 1000 rpm warm up idle. I normally push the choke in to let it warm up at 700....anyhow, starting is effortless. Cold idle is 500 warm is 700.

Did do a plug check and plugs are burning the fuel nicely.

So was all this worth it for a 305 V6? I think so. The power increase justifies the work involved in my opinion.

And Yes a Magnum intake will bolt directly onto non-magnum heads. You will want to use 305 intake gaskets though.

Well that's it guys! Anything else you wanna know just ask....I think next I'm gonna make headers or try some magnum manifolds. I need a stinkin dyno!

Since you're doing performance modifications, have you considered doing away with the points and converting to an HEI or Pertronix ignition?

[TJ's GMC]

BigBlock:

Thanks for the correct specs! Looks like I need to re-adjust my guesstimations! LOL!

I did consider HEI, but due to how clean the plugs are burning I didn't want to add extra spark that doesn't seem needed. It's hard to tell weather it would actually do any good or not. Plus I'm enjoying the fact I can run 89 in it. haha

[bigblockv6]

I found running the HEI in my 68 when it had the 305 enabled it to run much smoother at higher rpms, together with a 2 1/2 inch exhaust and Holley 500 it was a great combination and starting the engine from dead cold were instantaneous, barely touch the ignition and it fires up!

[TJ's GMC]

Originally Posted by bigblockv6

I found running the HEI in my 68 when it had the 305 enabled it to run much smoother at higher rpms, together with a 2 1/2 inch exhaust and Holley 500 it was a great combination and starting the engine from dead cold were instantaneous, barely touch the ignition and it fires up!

That's the same thing that happened when I got a hot HEI for my 292. Only thing I'm worried about is that the spark will be to hot and I can't run lower grade fuel for fear of detonation. I do have the timing set at 10 initial. But I am considering! I thinking of getting the HEI that's on Ebay. Then I might upgrade to a 750 cfm. LOL!

[bigblockv6]

I've never had a detonation problem with the HEI. Also I always wanted to find spark plugs for my 478 that's in my 68 now that would have the .060 gap so I found AC 44XLS6 were compatible.