Chevrolet 427 L88 Dyno Pull
Автокөліктер мен көлік құралдары
This 427 belongs to a 1968 Camaro SS. The car is originally an L78 car, but has had this 427 L88 since the early 70's. The car is true Day 2 car.
This engine has it's original steel crank, dimple rods, 12.5:1 compression, and a factory ZL1 camshaft. It has original GM 842 aluminum cylnider heads that were fitted with 2.30 intake valves (bowl blended for increased size). A GM 163 intake manifold (divider removed).
The only glitch in the dyno session was the ignition. This has a Roto-Faze point type distributor. As you can hear in the dyno pull, the points start to bounce at 6000 rpm.
Our original plan was to spin the engine to 7000 RPM. Obviously, that was not feasible with our ignition woes.
The engine with 40 degrees of timing responded with 575 hp @ 6000 RPM with 529 lb. ft. of torque @ 4700. Average HP from 4100-600 is 499.44 and average torque from the same range is 519.24
Пікірлер: 34
Greatest engine ever, just my opinion
@noahdunaway
29 күн бұрын
I have a 69 L-88 crate engine short block with a 1973 casting date. I bought a set of 074 aluminum open chamber heads about a year later. I ran it in my 68 Camaro for a few years and replaced it with a LS7 454. The L-88 has been sitting in my build room for about 30 years.
I purchased an L88 427 in 1988 from my mom‘s boyfriend ex-boyfriend actually at the time. he ordered it in 1970 and put it in his racing boat at the same time he ordered and LS6 454. When he sold the boat, he let it go with the 454 in it and sold me the 427. For $1000. it had the ZL1 camshaft in it. I put it in a 70 SS nova Then I put it in a 70 Monte Carlo. And and 1996 sold it for $4000 I kept the factory carburetor the factory intake. now all I have left is the carburetor.
Had an original L88 (minus air cleaner) in the 1980's. Sold it for something like $700.00. LOL SMH
My last 427, had 11.25-1 compression with RPM performer heads, a custom hydraulic roller, .585/.585 with .245/.255@.050 Holley Strip dominator and 850 carb with 2" hooker headers, made 550 HP and 513 TQ was done by 6000 rpm.
I have the ZL-1 cam in a 70's 454 LS-7. Similar numbers (539 tq @4900 / 582 hp @ 6100). interesting how the added displacement moves the torque peak down a little. Nice engine !
@americanormuscle2321
7 ай бұрын
The added .25in stroke does that for ya. Do like the numbers.
@hoost3056
6 ай бұрын
I've always thought the LS7 cam and the L88/ZL1 cam were close in spec.
@gordocarbo
6 ай бұрын
Makes it more driveable for sure. ANy vids on your LS7 Car?
@bengagnon6947
5 ай бұрын
These are lies it's only 430HP like what the factory specs say lol incredible power!
Very Cool !!!!
I had an l88 in my 52 Chevy
great numbers with the point bounce and especially that factory dual plane intake- Nice work!! Any head porting done?
@bouldermotorcar
3 ай бұрын
The bowls were worked in order to blend into the 2.30 intake valve. The intake divider was removed to emulate the factory L88 intake. Real basic old school package. Careful machine work and assembly. That's all
can u tell me the spec of the ZL1 cam is it the same as the L88 2nd design
@bouldermotorcar
Жыл бұрын
The ZL1 and 2nd design L88 are the same cam Tony
@tonyscreations7904
Жыл бұрын
@@bouldermotorcar thank you, i am in the process of doing a 66 427 and was interested in that cam design , but in in looking up the specs there differences , in my research of the lift i get 595 , some say 630 and then i get 595/618 there abouts some eve show 560 do u have the cam specs
@tonyscreations7904
Жыл бұрын
by the way great sounding motor !
@MrsSunshine75
9 ай бұрын
@@tonyscreations7904 I’m guessing by now you’ve found out that the L88 & ZL1/LS7 camshafts are totally different, the later having more duration, lift and tighter lobe separation!
Pls post numbers do they may be seen.
Those were nasty engines
Thought L88's were aluminum blocks?
@bouldermotorcar
Жыл бұрын
L88's we're an iron block. The ZL1 was the aluminum version
@pineyLt
Жыл бұрын
Correct, L88 had an iron block with aluminum heads and 12:1 compression, ZL1 added the aluminum block. Didn’t add any power over the iron block but it was all about weight savings for drag racing which is why the bulk went into Camaros. I’ll add the L71 had iron heads with a solid lifter cam and 11:1 compression, the L89 was the L71 with aluminum heads added.
@1000machz
10 ай бұрын
@@pineyLtand had higher compression and bigger cam
@gordocarbo
6 ай бұрын
@@bouldermotorcar Is the customer going to use an updated distributor? I know the vette guys insist on correct stuff but to hear this break up when its got more to go is a shame. What id give to have something like that.
@scottwest1813
6 ай бұрын
ZL-1 was aluminum block.
Couldn't put the resulting numbers up in a way we could read them ?
@gordocarbo
6 ай бұрын
Its in the description
@bengagnon6947
5 ай бұрын
@gordocarbo if you pause the video and zoom in on your phone you can read it
Too bad you can't read it... 🙄
@bouldermotorcar
Жыл бұрын
Dennis, here a link for the pull @ 38 degrees advance imgur.com/mptXqF2