:
327 ci lt1
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
I will say this. What happens when a piston has a larger surface area? What affect does the same cam have with different strokes? If you're capable of answering these then you'll will have your answer.
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
Then why do you keep asking about shorter strokes? Displacement being equal the larger bore shorter stroke will have more power, and peak hp will be at a higher rpm.
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
No, and I've already answered it, so if you can't figure it out that's your problem. Something tells me you're not that ignorant though.
I will say this. What happens when a piston has a larger surface area? What affect does the same cam have with different strokes? If you're capable of answering these then you'll will have your answer.
I will say this. What happens when a piston has a larger surface area? What affect does the same cam have with different strokes? If you're capable of answering these then you'll will have your answer.
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
So you're saying GM was wrong for building the 302? You're smarter than GM? All the dirt track guys building 301's were wrong too? Only 350's are any good, so don't ever use a 400 block? You're a piece of work with very limited knowledge of the SBC. Want to got back to large journal 302's and 327's?
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
For the reading impaired, I keep asking, because that is what this whole thread was about. THE OP ASKED IF HE SHOULD MAKE A 3.25" STROKE LT1! That is a shorter stroke. You have since been advocating BB/SS motors, but as I've said many times, that is not what the OP asked about. He asked about destroking an LT1. Your post sure sound like you believe that shortening the LT1's stroke will give a favorable ratio, and therefore, increase power. And it won't. So all your drivel in this entire thread is misleading and irrelevant. The OP will NEVER, make more power by changing to a shorter stroke "screamer", LT1.
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Want to get back to 307 and 350's being the same castings??
Last edited by Tom400CFI; Mar 26, 2014 at 10:26 PM.
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
For the reading impaired, I keep asking, because that is what this whole thread was about. THE OP ASKED IF HE SHOULD MAKE A 3.25" STROKE LT1! That is a shorter stroke. You have since been advocating BB/SS motors, but as I've said many times, that is not what the OP asked about. He asked about destroking an LT1. Your post sure sound like you believe that shortening the LT1's stroke will give a favorable ratio, and therefore, increase power. And it won't. So all your drivel in this entire thread is misleading and irrelevant. The OP will NEVER, make more power by changing to a shorter stroke "screamer", LT1.
You've been trying to make claims that I'm suggesting this or that. I call BS on your part. I've said what I said and implied nothing you wish to pull out of thin air. I will say it again, and I e4ncourage you to refute it, or STFU. Engines of equal displacement, the one with a larger bore and shorter stroke will create more power.
If you feel this is incorrect then please state your case? Or STFU.
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
NOooooo... Not what I was saying at all. You'll have to quote where I said that please, so I can correct it. As I have said NUMEROUS times, if you're working under a displacement limit, a BB/SS engine makes sense as it can be optimized. The 302 was built for a class/displacement limit. And as I've said many times in this thread, that is not what this thread was about. This thread is about de-stroking an LT1.
Keep going with the ASSumptions. You don't have a clue what you're talking about. Please quote where I said anything about 301's or "only 350's are any good". I HAVE a 400, FYI, and it's not my first...so....
Want to get back to 307 and 350's being the same castings??
Keep going with the ASSumptions. You don't have a clue what you're talking about. Please quote where I said anything about 301's or "only 350's are any good". I HAVE a 400, FYI, and it's not my first...so....
Want to get back to 307 and 350's being the same castings??
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Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
You've been trying to make claims that I'm suggesting this or that. I call BS on your part. I've said what I said and implied nothing you wish to pull out of thin air. I will say it again, and I encourage you to refute it, or STFU. Engines of equal displacement, the one with a larger bore and shorter stroke will create more power.
Last edited by Tom400CFI; Mar 26, 2014 at 10:40 PM.
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
Of course he CAN do it. Never said he couldn't and if I did, please quote where I did so that I can correct it. Thanks.
Right. So is it a good way for the OP to spend his money? To install a shorter crank? NO! That was his F'n question! Thank you for confirming what I have been saying all along.
Of course. But he asked about an LT1. As I said many times, "LT1" means heads intake cam...so AGAIN, we're taking about destroking a an LT1. What ever the case, any $$ he puts into making his 327 LT1 more powerful, I can put that same $$ into my 350, + the money that I didn't spend on a smaller crank, and be power ahead.
Of you're not suggesting anything...then why are you posting in this thread!? How are you helping the OP w/his question? For the reading comprehension challenged, I never disputed that. In fact I actually agreed with you in post #. What does that have to do w/the OP's question of destroking an LT1??
Right. So is it a good way for the OP to spend his money? To install a shorter crank? NO! That was his F'n question! Thank you for confirming what I have been saying all along.
Of course. But he asked about an LT1. As I said many times, "LT1" means heads intake cam...so AGAIN, we're taking about destroking a an LT1. What ever the case, any $$ he puts into making his 327 LT1 more powerful, I can put that same $$ into my 350, + the money that I didn't spend on a smaller crank, and be power ahead.
Of you're not suggesting anything...then why are you posting in this thread!? How are you helping the OP w/his question? For the reading comprehension challenged, I never disputed that. In fact I actually agreed with you in post #. What does that have to do w/the OP's question of destroking an LT1??
I hope this has given you an insight of what it's like reading your posts. I'm more of a the glass is half full, and if you don't have anything good to say, don't say it.
You have my sympathy sir!
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
You call yourself "glass 1/2 full"...to cover up that you've basically given out bad advice.
Drifting
Joined: Feb 2006
Posts: 1,423
Likes: 96
From: Magnolia Tx
Just to throw some gas on this fire, a 302 LT1 is not hard to put together. An L99 crank in an LT1 block is it. There are thousands of those 265 ci baby LT1s in old cop cars and taxis sitting in junk yards.
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Drifting
Joined: Feb 2006
Posts: 1,423
Likes: 96
From: Magnolia Tx
Pro
Joined: Mar 2013
Posts: 698
Likes: 162
From: Huntington WV
I you destroke any motor you are sacrificing torque to make more horsepower at the very top of the powerband.....this is true. But how much time do you really spend at max rpm? Watch your tach on the average full throttle blast though the gears. For the vast majority, very little so it makes more sense to go with stroke and cubes in a street driven car. You're going to spend much more time between say, 2500 to 4500 rpm and that's where most of the torque is. If you're building a marine engine or a round tracker then it's sensible to build a rev happy motor, but not on the street.
Last edited by Polo Vert; Mar 28, 2014 at 02:56 AM.
Le Mans Master
Joined: Apr 2000
Posts: 5,713
Likes: 105
From: Manassas VA
So we all KNOW the advantages to the 327... the short stroke. gives great revs sometimes ridiculously high. the heads you have that flow good on the 350, would scream on the 327 with less demand and funny enough the 327 has PROVEN to perform right along side the 350. just looked at lt cranks, and there isnt CRAP below the 5.7 margin. Someone should start MAKING these does anyone agree? Can I HAVE a company MAKE one? Who? -Colt
IMO building a high RPM LT1, the limits are going to be the Opti, and keeping the valve train stable. My 385 will rev to 7000 rpms but the limits are the opti and valve train. I have seen Will (rklessdriver) rev his to 7400-7600 several times.
Le Mans Master
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
IMO the 327 it is only practical with a manual trans. in a duel purpose or track car where a classes are by engine displacement. 302,303,and 304 were for Trans Am and it 305 cid limit. In Chevrolet, AMC,& Fords' case easy to build. Jenkin"s little 10k rpm 331 was about a weight break over the BB cars. Glidden's 377 in the end had to carry more weight over the everything. Once the rules changed in favor of the "Mountain Motors" those engines faded from the P/S spot light If a 327 could give equal performance and better economy I think it could be worthwhile.
Pro
Joined: Jul 2002
Posts: 703
Likes: 0
From: Milwaukee Wi
FI ? If so other issues may develop.
Is the ignition system up to it?
Can the stock ECU control the injectors over 6500 rpms? There are time contraints. VE table may only go to 6500 if that(6200?).
Same on SA tables.
The rev limiter needs to be changed or disabled.
Is the ignition system up to it?
Can the stock ECU control the injectors over 6500 rpms? There are time contraints. VE table may only go to 6500 if that(6200?).
Same on SA tables.
The rev limiter needs to be changed or disabled.