Old School 427 or Modular 5.0?

[Jerry Clayton]

itstock----have you ever weighed any of the parts???keep in mind that the weights of the available alternators, starters,etc will be pretty much the same, the oil pumps and distributors the same, front covers/waterpumps fairly close, front dampners the same, flywheels can be anywhere but available at what ever weight you want so in real--the same---it pretty much gets down ti weight of internal rotating parts and the weight of most of the available present day cranks, rods,pistons are pretty close--------

I'm thinking that most of this misconception comes from looking at iron head/manifold FEs compared to the 289/302 small blocks and not the much heavier 351w blocks----

But-------I've weighed lots of parts over the years--------and the huge differances that people speak of is sorta like comparing camels to horses------------

[eschaider]

Originally Posted by Jerry Clayton

itstock----have you ever weighed any of the parts???keep in mind that the weights of the available alternators, starters,etc will be pretty much the same, the oil pumps and distributors the same, front covers/waterpumps fairly close, front dampners the same, flywheels can be anywhere but available at what ever weight you want so in real--the same---it pretty much gets down ti weight of internal rotating parts and the weight of most of the available present day cranks, rods,pistons are pretty close--------

I'm thinking that most of this misconception comes from looking at iron head/manifold FEs compared to the 289/302 small blocks and not the much heavier 351w blocks----

But-------I've weighed lots of parts over the years--------and the huge differances that people speak of is sorta like comparing camels to horses------------

Jerry is hitting the nail square on the head and telling it like it really is!

Originally Posted by MJJ

I already have a 770hp/760tq GT500 and a 575hp/600tq 04 Cobra.

I am looking for a great sounding cobra that has great street manners.

I EFI for the reliability and easy starting but also want an eight stack system for looks. Yes I admit it.

Probably 425-475hp with similar torque. Some lopey idle is nice but not so much it sounds like it is going to stall every second.

My wife wants to drive it as well so I will be having power brakes and possibly power steering. Yes I know...just buy a new corvette......

I like the fact that the 427W is much lighter on the nose and handles better.

I respect others that have the true cobra period correct look and feel. I just want something that is fun.

You have already answered your own question MJJ. The ModMotor in supercharged form at the level you have built yours would be unsafe for most drivers in this light a car. You already know how useless first gear is in either your GT500 or Terminator. You also know how impressive those engines look when you open the hood.

So don't build for 770HP, turn the wick down and shoot for 500/550 RWHP - it's a walk in the park. Build it like your Terminator, you will have plenty of power! Don't forget most of the guys on this site think FWHP, you are talking RWHP on the GT500 and the Terminator. 770 at the tire is over 900 at the flywheel! I can count the number of cars on this site on one hand with several fingers missing that eclipse that number.

You already know the drivability, reliability and street manners that you get with the blown ModMotors. All you need to do is back a couple hundred horsepower out of the engine (how often do you hear that on this site?) to hit your targets.

Once you strap a blower on one of these engines it is a different engine in the extreme - and you know what I mean because you already own one. Like Dorothy in the Wizard of OZ who wanted to go home and had the ability all the time, you do too! All you have to do (figuratively speaking) is click your heels - stuff a blown ModMotor in there.

Think of your GT500 or Terminator with 1500 to 1800 lbs removed and a whisker less power. Mind bending performance and excellent street manners.

Ed

[MJJ]

Originally Posted by eschaider

Jerry is hitting the nail square on the head and telling it like it really is!




You have already answered your own question MJJ. The ModMotor in supercharged form at the level you have built yours would be unsafe for most drivers in this light a car. You already know how useless first gear is in either your GT500 or Terminator. You also know how impressive those engines look when you open the hood.

So don't build for 770HP, turn the wick down and shoot for 500/550 RWHP - it's a walk in the park. Build it like your Terminator, you will have plenty of power! Don't forget most of the guys on this site think FWHP, you are talking RWHP on the GT500 and the Terminator. 770 at the tire is over 900 at the flywheel! I can count the number of cars on this site on one hand with several fingers missing that eclipse that number.

You already know the drivability, reliability and street manners that you get with the blown ModMotors. All you need to do is back a couple hundred horsepower out of the engine (how often do you hear that on this site?) to hit your targets.

Once you strap a blower on one of these engines it is a different engine in the extreme - and you know what I mean because you already own one. Like Dorothy in the Wizard of OZ who wanted to go home and had the ability all the time, you do too! All you have to do (figuratively speaking) is click your heels - stuff a blown ModMotor in there.

Think of your GT500 or Terminator with 1500 to 1800 lbs removed and a whisker less power. Mind bending performance and excellent street manners.

Ed

Ed

Thanks for the insight. You always keep the message... 1) simple 2) relevant 3)Impactful.

MJJ

[Dimis]

Originally Posted by MJJ

Ed

Thanks for the insight. You always keep the message... 1) simple 2) relevant 3)Impactful.

MJJ

Agreed ^^^

...and from my experiences, you missed No. 4)
"Quite erudite on the subject also"

[itstock]

Originally Posted by Jerry Clayton

itstock----have you ever weighed any of the parts???keep in mind that the weights of the available alternators, starters,etc will be pretty much the same, the oil pumps and distributors the same, front covers/waterpumps fairly close, front dampners the same, flywheels can be anywhere but available at what ever weight you want so in real--the same---it pretty much gets down ti weight of internal rotating parts and the weight of most of the available present day cranks, rods,pistons are pretty close--------

I'm thinking that most of this misconception comes from looking at iron head/manifold FEs compared to the 289/302 small blocks and not the much heavier 351w blocks----

But-------I've weighed lots of parts over the years--------and the huge differances that people speak of is sorta like comparing camels to horses------------

Exactly, it's hard to get an exact difference. But basic "crate" engines, I've seen anywhere from 140 to 180 for the FE (below 428).

Iron to iron 351 vs 390FE is recorded as 510 vs 650 at a bunch of different places. So a basic comparison is that the 390 series weighs at least 140 pounds more. An iron 460 is going to weigh in to the 700's.

DIfferent numbers yet again, but this is also listed on various sites.

221-302W = 460

302 Boss = 500

351W = 525

351C-Boss = 550

351M-400 = 575

332-428FE = 625

427 HEMI = 680

429-460 = 720

429-Boss = 635