Driving feel differences between 390, 427, 428, and strokers

[Posi67]

No power adders Joe and the 341 Ci is due to class limitations. It's basically a Mini Pro Stock deal, sheet intake and 2 rather large Carbs, very BIG Cam and plenty of RPM. no disrespect to your knowledge or ability but as I recall, you also didn't believe a 302 based block could be 390+ CI. Same guy built that deal and it's fast and reliable.

It's been several years since he had the 341 on a Dyno so I messaged him to refresh my memory. Changes happen every year to this deal so no idea the current configuration.

   https://youtu.be/hGYBM2vx890

[scott foxwell]

Well, I'm sorry that I have a "cop out" excuse for not being an engine  building genius however I'm also not full of myself. Fact is, I've owned one car most of my life and fooling around with it is a hobby so extracting the most HP and having the perfect combination was never a goal. My comment was the 454 didn't "FEEL" as fast as the 427 and I qualified that with the info that I never raced the latter.  That was in response to the original posters question.

As for the SBF... That is factual, the guy also isn't a pro engine builder but has the means to buy what he needs. Do a search and see how many Fords are running in Comp Eliminator.

However, you still didn't tell us how much boost, or N2O he is running to make 935 hp with 341 cubic inches.  Comp. Eliminator can run anything but nitromethane.  I have been at this since 1962, and I am always a bit doubtful until the facts are shown.  It is not easy to build an engine to make 2 hp/ci NA, unless it has Fuel injection or sheetmetal intake with 2 x 4v.  NASCAR engines are still in the 2.3-2.4hp/ci and they usually only last for one race before complete rebuild.  It is the small cubic inch that makes it questionable.  Joe-JDC

Joe, no disrespect, but you need to catch up. 2+ hp/ci is regular business with one carb and a cast intake these days...kinda like Cup motors were before they went to efi. Their "one race" after qualifying could be over 600mi @ 8500-9000rpm all day and still running strong. 341 making 935hp is pretty regular stuff these days.

[scott foxwell]

No power adders Joe and the 341 Ci is due to class limitations. It's basically a Mini Pro Stock deal, sheet intake and 2 rather large Carbs, very BIG Cam and plenty of RPM. no disrespect to your knowledge or ability but as I recall, you also didn't believe a 302 based block could be 390+ CI. Same guy built that deal and it's fast and reliable.

It's been several years since he had the 341 on a Dyno so I messaged him to refresh my memory. Changes happen every year to this deal so no idea the current configuration.

   https://youtu.be/hGYBM2vx890

Sounds awesome!

[Posi67]

I lied about the HP. Talked to the owner today and he said it made 945 at 10,200 RPM on a Inertia Dyno that is known to be conservative/realistic. Prior to that he ran it on his friends Super Flow water brake Dyno and it was right around 1000. He said that was a similar number to many other engines in the same category and is accepted as legit because most everyone uses a Super Flow Dyno. He's sticking with his 945 number and actually recently bought that same Dyno.

Now.... back to the FE stuff eh.

[Joe-JDC]

And what were the cubic inches and type of fuel?  Just asking.  Joe-JDC

[Posi67]

As previously stated the CI is 341. Fuel is Comp Eliminator spec fuel which is C-16. Compression is 15.5 to 1 and the valve lift is in the 1.20 intake and 1.0 on the exh. range. Piston to valve clearance is a bit of an issue as you can imagine but he has new pistons on the way and hopes to open the exh up a bit more. Valve spring life isn't that great. The car set the C/A record a couple years back so was checked and legit. 

[scott foxwell]

As previously stated the CI is 341. Fuel is Comp Eliminator spec fuel which is C-16. Compression is 15.5 to 1 and the valve lift is in the 1.20 intake and 1.0 on the exh. range. Piston to valve clearance is a bit of an issue as you can imagine but he has new pistons on the way and hopes to open the exh up a bit more. Valve spring life isn't that great. The car set the C/A record a couple years back so was checked and legit.

Heads probably by Losito or Foltz...?

[machoneman]

Likely a 9 degree Losito head:

http://www.ultraproplus.com/Products/billet_ford_heads.html

As previously stated the CI is 341. Fuel is Comp Eliminator spec fuel which is C-16. Compression is 15.5 to 1 and the valve lift is in the 1.20 intake and 1.0 on the exh. range. Piston to valve clearance is a bit of an issue as you can imagine but he has new pistons on the way and hopes to open the exh up a bit more. Valve spring life isn't that great. The car set the C/A record a couple years back so was checked and legit.

Heads probably by Losito or Foltz...?

[scott foxwell]

Likely a 9 degree Losito head:

http://www.ultraproplus.com/Products/billet_ford_heads.html

As previously stated the CI is 341. Fuel is Comp Eliminator spec fuel which is C-16. Compression is 15.5 to 1 and the valve lift is in the 1.20 intake and 1.0 on the exh. range. Piston to valve clearance is a bit of an issue as you can imagine but he has new pistons on the way and hopes to open the exh up a bit more. Valve spring life isn't that great. The car set the C/A record a couple years back so was checked and legit.

Heads probably by Losito or Foltz...?

Nice.

[Joe-JDC]

No disrespect either.  Just a one of a kind engine, that is not even typical, but impressive.  I am still curious if it is an 8.2" deck, though.  I do not have a problem with that kind of horsepower with the 8.900/9.000/9.200" deck blocks.  We have several here locally with the 9.000" deck(milled down 9.2) that run in the 8s NA on drag radials using the D-3 heads, and one that is knocking on 7.99 with slicks(has run 8.003)NA.  Joe-JDC

[My427stang]

By the way, just pulled a 445 out of my 71 4x4 F100 for a suspected bad piston. Slapped a little bench build 390 in it.  Clean little motor, but should be a HECK of a drop in power

Before: 10:1 445, zero deck, ported iron heads 2.09/1.67 undercut stem, good valve job, ported RPM, 1000 HP Holley, SFT Bullet cam, close to Comp 282S but little more lift and 112 LSA on 106

Now: 9.3:1 390, .004 below, stock replacement 2.02/1.57, not ported, decent valve job, stock Streetmaster, 750 Holley, Crane 272 (Very close to a 268H intake lobe) 112 LSA on 109

Thinking 175-200 hp less?  LOL I'd say that would be a driving difference, but a quiet engine will allow me time to get the Zyglo out and figure out if I have a cracked Probe piston...

[Heo]

Should be interesting to see if and What you find