88BlackZ-51

Like most of you, I have the "John Lingenfelter" book on modifying small block chevy engines. On page 158, This combo is stated:

383 cid EFI
440 HP/480 LBS-FT
This would make a fantastic street engine. There is also a milder version of this engine using the SuperRam but with a milder cam that will idle at 750 rpm yet still make 395 horsepower and 450 lbs-ft. of torque. Actually, calling this combination "mild" is a misnomer.
The short block for this 383 is similar to the 385-horsepower carb combination. This 383 uses a .030-over 350 block, cast 400 crank and 5.565-inch 400 rods, Sealed-Power forged pistons, moly rings and Clevite bearings. A roller timing chain drive a Lingenfelter hyd. roller camshaft with 219 degrees of duration at .050-inch tappet lift, .503/.525-inch valve lift and a 112 degree lobe seperation angle.
We then port a set of aluminum 'Vette heads with 2.00/1.56-inch valves adding matching valve springs and Comp Cams stainless steel 1.6:1 rocker arms. With the SuperRam and a 58mm throttle body on the intake side and 1 3/4 headers, this engine is a definite torque monster making 363 lbs-ft. of torque at 1600 rpm! Peak horsepower occurs at 5250 rpm. Like many of the other combinations, a loose converter would help acceleration.

That is for you guys that dont have the book. Anyways to make a long story short. LPE did well with those '113' vette heads, and since that time better heads have came on the market.

This brings me to this: I have been a member of this forum for many years now, and I keep hearing ppl talk about this combo how it is a no brainer etc........How it makes power and the 219 is god for the SuperRam.

I have seen so many posts as of late. One being sami85L98 who has recently raced his car and trapped in the 106-108 with basically the same combo listed above, but better flowing heads. Other being USAsOnlyWay who dynoed in the 335rwhp range with a 4+3 which is around the 400chp mark with better flowing heads then the old '113's'. List goes on and on.

Then there is the other side on the coin. There are some guys that build some kick *** 383's. One being Rich (Corvette0096). He dynoed in the 385rwhp/425rwtq range with a 700R4., Rich also has alot of money into those heads. The other being Jay (J Z06) who's car ran amazing, and I think he had ported 113's.

I know that 1/4 mile trap speed, and dyno numbers arent everything. But it does give you an idea how much power your car is making. I guess I am in somewhat disbelief that LPE made those #'s with '113's'. I have talked to a few head porters have told me that if you got 250cfm out of those, you did really well. Most of these porter's tell me the power is the heads. If this is so, then how did LPE get such good numbers with 113's with small valves? Also anyone on hear actually have an LPE 383 built by LPE?

Thanks for reading. Sorry HotRod! BTW, Happy Thanksgiving to my Yankee pals.

*89x2*

the engine I got fromLPE had .525/.525 in-lift with the cam installed by LPE when it was built.

Car had a less than mild idle for sure, but was reasonable on the street.

I drove that car for almost 10 years with that combo before selling it - new owner likes the car enough to be spending 19k on a total cosmetic restoration of the car (it was VERY nice when I sold it 2 yrs ago).

One thing I recall - never any mosquitos around that car while it was running -

88BlackZ-51

Did you race it or dyno it? Thanks for posting. Ported 113's?

*89x2*

raced it

12.4 @ 115 in an F Body 3.27 gears / auto

AFR Heads

FWIW, my friend had an LPE 406 and when he dropped a few valves in the LPE heads, he put AFR's on in their place - car ran the same. Saved a bunch of money.

Grease Monkey

how much did the LPE setup go for cost wise???

CFI-EFI

For the lack of a few hundredths, these are SMALL valves?

RACE ON!!!

95wht6spd

Probably because LPE is using GROSS HP, not NET that you are comparing to in other examples.

neat

Flow numbers aren't everything. LS1 heads flow about 255 stock, and there are stock headed LS1 car's making 425+ at the wheels. According to your bench racing, that's impossible.

I seriously doubt you've talked to anyone who has half the experience Lingefelter does. Why is it so hard to believe he made the numbers with a ported 113 head? I made 380 RWHP with a 383 LT1 with basically stock heads. All I did to them was clean the casting flash and port match them to the intake. Ported 113's should smash my home made LT1 heads, especially if they were ported by someone like LPE.

Stop bench racing. Published flow numbers won't make your car go fast. There is always going to be an article that claims the opposite of the one you are reading. Here, read this article:

http://www.mototuneusa.com/think_fast.htm

I don't agree with most of it, but it does make a good arguement against flow bench numbers.

I guess none of it matters though, this is just more of your mod masturbation. Lots of talk that feels good, but all your doing is wasting everyones time.

88BlackZ-51

Actually you wasted your time in replying Josh. Nothing is impossible.

88BlackZ-51

No clue. Good question.

88BlackZ-51

For a 383, I would say these are small yes. But if you compare this to a 1.76 valve then the 2.00 is big. Typically if one guy weighs 200 pounds, and another guy weighs 170 pounds then I would say the 170 pound guy is small.

Don't eat too much, You might get sleepy.

Aggravated4life

If you mean just the ported heads,they were like 1500-2000 exchanged with your old cores.
I had their catalog years ago when they were still doing L98 conversion packages and they were NOT cheap compared to others,but you usually got what you paid for with LPE.
Its amazing what LPE got out of the stock L98 when he got through with it.

Snakecharmer383

Just order an engine already!!

I believe I pm'd you about my engine combo but if I didn't take a look at my sig. I'm extremely happy with my engine. I have an idle problem that seems to come and go but other than that never any problems. The performance is awesome. I get flagged down just about everytime I drive it from people asking me to take them for a rip. Puts a smile on my face!!

CFI-EFI

So 2.00" valves AREN'T small, after all? Did you forget which side of the discussion you were on?

RACE ON!!!

88BlackZ-51

Yeah it is amazing when you think about it.

88BlackZ-51

yeah your motor hauls some ***. car is in heated storage. motor will be going in next year. you keep that car real clean.

88BlackZ-51

You tell me, Are 2.00 valves small? Who's your daddy?

Vic'89

LPE used velocity and torque to run quick 1/4 mile times.

I have seen JD's LPE 383 Vette run 120 MPH with 113 heads.
He sent the car to LPE to have the motor done.

Vic

Aggravated4life

I was also thinking abit more...the old LPE catalog advertised their Ported D port heads as a true 40+ HP bolt on gain(cam,engine size,compression,tune,etc. plays a role as well)...I believe it too.

If you look at say a crate GM 350 ZZ4 engine,carbed,with a ZZ4 cam and L98 D port stock heads,it made around 355 HP...so the cnc ported LPE L98 heads giving ya another 40 HP or so on a 350 was just about dead on from their engine package claims,especially
so equipped with the far better intake set up like the Super Ram.

Of course,the LPE 383 packages sucked in more air,so power was increased more so with HP and TQ.I too remember JD's 383 from LPE...I believe he went 11's with slicks on with some tuning problems..but its been a while.
I would have loved to have bought that car off him!

sami85L98

I have not read whole thread yet,

I spoke to tim at LPE before i started 383 project, i spoke to him about 1/2 hr solid, they quoted me 5500 for just a 383 short block (complete) and 2600 for 113 ported heads, he said after they finished it will be a 450 CHP and 500 Ctorque.

Remmber problems on my car"
1> #2 cylinder is a problem, plug gets bad every few thousand miles.
but compression test said 192 psi (both dry and wet test) other cylinders were 200 psi.

2> Iam inexperienced driver when it comes to Drag racing still learning.
3> Timing has never solved on my car, still i dont know what timing iam driving, numvers dont display on balancer when hit y Timing light, so thats mystery,

4> still fighting with code 34(low manifold pressure MAP).
5> When i raced it, still it has crappy 33k miles and 5 yrs old continental tires on it, slipping and skids so bad i have turn steering (L or R) to go straight on a 1/4 mile, car nerver went straight, 2.32 60 ft is just BS and ridiculously bad.

Usaonlyway (chris) car is a twin to mine both interior/exterior/engine except he has 4+3 tranny.

Rich (corvette0096) his car is professionally built by racer mechanic and they built only race cars (no camry). Plus rich is a experienced 1/4 drag racer, he raced 100's of times so he know how to drive and when to hammer it and when to shift gears.

113 heads are more than enough for a 450 hp car.

stop asking too many questions, every car is a diff eventhough same parts are used, but it will be close to eachother though.

start modding bud, its about time, questionaire session is over, u know everything now more than an average person, its about time pull the trigger and start modding.

As u said over the phone today u dont wanna spent more 2-3k grand, so send ur short block to pete k and let him do it, ofcourse 383. Or bring the car to him, fly back to canada and wait for a month and its done.

How about this combo, 383 on a 350 short block Roller ofcorse, .030 bored over, Scat/lunati 3.75 crank steel, SRP pistons forged 10.3- 10.9:1, CC 22x/23x dur and as much as lift on a 112 LS. Brodix 200cc race rite heads, Port the hell out of SR runners, port the base of SR too, 58 mm TB by AS n M or Tpis. 24 FMS. This will satisfy u both on track and as well on street.

Sell ur TFS heads it is not recommended by J lingenfelter anyway.

Good luck. sami.