Dyno’d the 352 again today, with a BT MR 8V this time....

[blykins]

It made 465 hp and 417 lbft.

Lot of effort for no hp, but it sure looks good.

Don’t know if the secondary springs were stiff or JJ just couldn’t make enough vacuum to open them, so we had to make them open...

That was worth a 15 hp bump, but 465 was all she would muster.

At this point I’m thinking the intakes are above the capacity of the engine, but maybe not the right design for the rpm, so I’ll have to debate on the next step.

[blykins]

EDITED.  I can't subtract.

What's interesting is that the BT intake lowered the peak hp rpm by 600 rpm......

[Dumpling]

Cubic inches may be small enough to use a BXR intake mounted to a FE Power adapter (with intermediate Price Motorsport adapters)...

[plovett]

You should get Jay's book.  The BT 2x4 didn't start kicking butt until it was on the "390 Stroker" and the "427 Sideoiler" engines, 517 hp and 596 hp respectively.  It was just so-so on the milder combos.

pl

[frnkeore]

I think you need to borrow a TP manifold, to know if your maxed out on the intake side.

[blykins]

You should get Jay's book.  The BT 2x4 didn't start kicking butt until it was on the "390 Stroker" and the "427 Sideoiler" engines, 517 hp and 596 hp respectively.  It was just so-so on the milder combos.

pl

I agree Jay's book contains a lot of useful information, but I don't think there's anything in there about such a small engine pulling this kind of rpm.  Kind of an odd duck. 

At this point, I don't know if it's an intake deal, or if I need to do something a little different with the cam, which is what I'm leaning toward.   I do things according to experience and I didn't have previous experience with this small of an FE with this kind of goal.  Normally, 352's are mild little stump pullers for pickups and heavy cars.

Frank, do you mean a Tunnel Wedge?  I've thought about that....

[plovett]

I don't think the intake doesn't really cares if you are making 465 peak hp with a 352 at 6800 rpm, or 465 peak hp with a 427 at 6000 rpm.   I mean everything makes some kind of difference, but not much at peak hp here.

Jay tried this intake on engines ranging from 407 hp to 645 hp. 

pl

[blykins]

I don't think the intake doesn't really cares if you are making 465 peak hp with a 352 at 6800 rpm, or 465 peak hp with a 427 at 6000 rpm.   I mean everything makes some kind of difference, but not much at peak hp here.

Jay tried this intake on engines ranging from 407 hp to 645 hp. 

pl

I think I'd have to disagree with that, as wave harmonics depend on the rpm range, displacement, etc. 

Either way, I'll have to come up with another game plan.  It will either be an intake change or a cam change.  If it's an intake change, I'd probably follow Frank's suggestion and see if I could borrow a TW, although I hate borrowing guys' $$$ intakes.

[plovett]

I have a ported Dove TW you can borrow.

pl

[plovett]

I don't think the intake doesn't really cares if you are making 465 peak hp with a 352 at 6800 rpm, or 465 peak hp with a 427 at 6000 rpm.   I mean everything makes some kind of difference, but not much at peak hp here.

Jay tried this intake on engines ranging from 407 hp to 645 hp. 

pl

I think I'd have to disagree with that, as wave harmonics depend on the rpm range, displacement, etc. 

Either way, I'll have to come up with another game plan.  It will either be an intake change or a cam change.  If it's an intake change, I'd probably follow Frank's suggestion and see if I could borrow a TW, although I hate borrowing guys' $$$ intakes.

So you think the intake would be affected significantly (peak hp?) on two different cid/rpm combos making otherwise similar hp?

pl

[blykins]

I don't think the intake doesn't really cares if you are making 465 peak hp with a 352 at 6800 rpm, or 465 peak hp with a 427 at 6000 rpm.   I mean everything makes some kind of difference, but not much at peak hp here.

Jay tried this intake on engines ranging from 407 hp to 645 hp. 

pl

I think I'd have to disagree with that, as wave harmonics depend on the rpm range, displacement, etc. 

Either way, I'll have to come up with another game plan.  It will either be an intake change or a cam change.  If it's an intake change, I'd probably follow Frank's suggestion and see if I could borrow a TW, although I hate borrowing guys' $$$ intakes.

So you think the intake would be affected significantly (peak hp?) on two different cid/rpm combos making otherwise similar hp?

pl

Would be affected, or would affect?  LOL 

Yes, I do think it would affect. 

[blykins]

I have a ported Dove TW you can borrow.

pl

I sure appreciate it, but the way my heads and block have been cut, I'm sure the intake would need to be cut too.   Plus, with my luck, UPS/FedEx would lose it. 

I think I'm gonna try a cam swap first before I try different intakes.  I don't have experience with camming FE's this size for this kind of hp/rpm and comparing the cam to the ones I use in my 351C's, I have quite a bit more overlap. 

I think with some creativity, I can swap cams without pulling the intake. 

[frnkeore]

[/quote]
Frank, do you mean a Tunnel Wedge?  I've thought about that....
[/quote]
Actually, I was referring to a Tunnel Port, such as a DOVE or a 351C on Jay's adapter. They seem to do a little better that the Tunnel Wedge but, a TW would be good to try.

If there is more to be had on the intake side, it would be good to get before changing cam timing. That's why I said borrow.

It would be a good "Comparo" engine, to compliment Jay's findings.

[blykins]

Frank, do you mean a Tunnel Wedge?  I've thought about that....
[/quote]
Actually, I was referring to a Tunnel Port, such as a DOVE or a 351C on Jay's adapter. They seem to do a little better that the Tunnel Wedge but, a TW would be good to try.

If there is more to be had on the intake side, it would be good to get before changing cam timing. That's why I said borrow.

It would be a good "Comparo" engine, to compliment Jay's findings.
[/quote]

A Tunnel Port intake wouldn't work with these heads.  Totally different shape and layout, plus you can get into some funky pushrod tube issues with blocks/heads that have been whacked a bunch. 

I've thought about something on one of Jay's adapters, but haven't got too far with that idea.

[plovett]

I don't think the intake doesn't really cares if you are making 465 peak hp with a 352 at 6800 rpm, or 465 peak hp with a 427 at 6000 rpm.   I mean everything makes some kind of difference, but not much at peak hp here.

Jay tried this intake on engines ranging from 407 hp to 645 hp. 

pl

I think I'd have to disagree with that, as wave harmonics depend on the rpm range, displacement, etc. 

Either way, I'll have to come up with another game plan.  It will either be an intake change or a cam change.  If it's an intake change, I'd probably follow Frank's suggestion and see if I could borrow a TW, although I hate borrowing guys' $$$ intakes.

So you think the intake would be affected significantly (peak hp?) on two different cid/rpm combos making otherwise similar hp?

pl

Would be affected, or would affect?  LOL 

Yes, I do think it would affect.

I guess I should have said ,"would the function of the intake (manifold) be affected by the differences in the two combos which otherwise make similar hp."

Or you can be intentionally daft and argumentative.   

pl