I must be going senile

[73 Mike]

I got the old engine out of the car on Sunday. It got pretty hot in the afternoon so I spent time moving parts over to the new block rather than installing the block and then putting on the pulleys and such.

While doing this, I kind of noticed a bit of height differenve in the intakes.

Old:



New:



Turns out Summit shipped me an RPM intake instead of the Performer that I ordered. I wondered why the plenum seemed so big

Fudge :sweat: Hope the drop base and shorter air filter is enough. No matter. If all goes well, I'm switching to a Vic Jr later anyways.

One of the last things that I removed from the old engine was the valve covers and what should I find:



A closer view in case you missed it:



Almost brought me to tears. By way of background, I'm replacing the old engine because after break in, it seemed to lack the power it had at first and had a very bad shake, especially at idle. I assumed that the rotating assembly had not been balanced.

Do you think having the intakes closed on #5 and #7 might have contributed to this? Oh and both polylocks were off on #4.

What anoys me most is that I'm always telling people to look for the simplest and cheepest solution first and here I miss something this basic.

The only up side is that if it is senility, I'll forget about this soon.

 

[mrvette]

:hissyfit:

Some daze it's better to forget to remember....

:cussing::twitch:

 

[Twin_Turbo]

So your new engine has iron heads and the old one edelbrock alu heads? Old motor has stainless rockers, new one has alu extruded ones? I'm thinking your old one has nicer parts on it, what about in it? Maybe fix the lock nut issue and put it back in?

 

[73 Mike]

So your new engine has iron heads and the old one edelbrock alu heads? Old motor has stainless rockers, new one has alu extruded ones? I'm thinking your old one has nicer parts on it, what about in it? Maybe fix the lock nut issue and put it back in?

Good observations but a pretty different build.

I bought the new engine unassembled but designed by a local buider that was going broke. The compression is reltively low (9.8:1) with the 72 cc chambers, so I think the iron head is suitable. Has 200 cc intake runners too so is well matched to the stroker displacement. It already had 7/16 studs so the rockers from the old engine won't fit.

The old engine's aluminum heads gave a nice compression ratio of about 10.5:1 with the 64 cc chambers but the 170 cc runners weren't well suited to the 400 engine. It was what I had at the time. Never really got to run it long enough to see how well or how poorly the combo worked.

 

[Twin_Turbo]

Yeah, the performer heads are too small for a stroker, agree there.

 

[73 Mike]

For the small runners, the flow was really pretty good, but I think the heads are much better suited to a 350. I originally bought them for my 81.

 

[mrvette]

For the small runners, the flow was really pretty good, but I think the heads are much better suited to a 350. I originally bought them for my 81.

Any plans for them?? if for sale...lemme know, just the heads and rockers...

 

[big2bird]

I got the old engine out of the car on Sunday. It got pretty hot in the afternoon so I spent time moving parts over to the new block rather than installing the block and then putting on the pulleys and such.

While doing this, I kind of noticed a bit of height differenve in the intakes.

Old:



New:



Turns out Summit shipped me an RPM intake instead of the Performer that I ordered. I wondered why the plenum seemed so big

Fudge :sweat: Hope the drop base and shorter air filter is enough. No matter. If all goes well, I'm switching to a Vic Jr later anyways.

One of the last things that I removed from the old engine was the valve covers and what should I find:



A closer view in case you missed it:



Almost brought me to tears. By way of background, I'm replacing the old engine because after break in, it seemed to lack the power it had at first and had a very bad shake, especially at idle. I assumed that the rotating assembly had not been balanced.

Do you think having the intakes closed on #5 and #7 might have contributed to this? Oh and both polylocks were off on #4.

What anoys me most is that I'm always telling people to look for the simplest and cheepest solution first and here I miss something this basic.

The only up side is that if it is senility, I'll forget about this soon.

Don't you hate when that happens?:crap: