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Post by The Nose on Sept 8, 2011 20:39:48 GMT -5
Joker ive gone through and read pretty much every post and have not read anything on how well these do with heat. Do they heat up quickly or keep there cool?
That video joker u said that was a completely stock 5.3 nothing else done to it? If i were to get one from a junkyard would i have to buy anything in order for it to run. I really want to run one but dont have a ton of money to spend getting it going as i am a college student.
Thanks for all your help joker. Great sounding motors by the way!
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joker14
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Post by joker14 on Sept 9, 2011 0:03:38 GMT -5
well, i have not busted a radiator in one yet and ran it till it burnt down. As matter of fact, i have not broken a radiator in years to speak of anyways. But what i can tell you is when you first start it, you will get a little spooked by how quick it heats the water. They are reverse flow and have priority cooling so the water does not soak through the motor to heat up it actually pushes the water down from the top and out the block so you will see heat almost immediately. However about 170 it stops climbing. I have not see my gauge at 200 yet nor have a even seen it build pressure. After the heat i can hold the upper hose with one hand and squeeze the hose together. That about 5 lbs and about 180 ish degrees by my calibrated hand. ;D
My 400 sbc i can do the same with so i think if you have a good knowledge of cooling systems and how they work it should not be much different but if i hold one of my 400's wide ass open in a mud hole of a derby they will get pretty warm. The LS stuff i have not seen any type of heat in them yet. Will they run for 60 minutes with no water in them like all these guys claim they are doing? Doubtfull but im trying to find out. i will cook one soon just to find out. They do like heat though. They dont run very good under 160-170ish, they like some heat. Thats all i can tell you at this point.
As for those heads, they are 241's, stock camaro head, on a 5.3 it will knock some compression out but the flow is a little better. Its a wash in my eyes in a derby engine. Ive done both and cant really tell.
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Post by Deleted on Sept 9, 2011 0:10:38 GMT -5
Ive been reading this post and maybe I missed it but are you running old style turbo 350/400 with and a spacer for the torque converter? I know the bellhousing bolts up but I read this right after 12 pages there is a space for the converter. Thanks for any info.
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Post by bigpoppa on Sept 9, 2011 3:25:57 GMT -5
The ideal motor would be an early pre-2001 lq4/9 with iron heads to reduce chance of warpage of heads due to heat. Any classic gm trans will bolt up, Hughes makes a spacer. All you have to do is elongate one of the torque converter holes on the ls flywheel. These motors are just like a sbc or any other motor when it comes to heat but ls motors can from the factory take more abuse than a factory sbc. Don't be afraid torun these hard. Junkyard 5.3 plus a z06 cam or small torque cam 220's duration will be fine. Keep factory motors redline around 6k. Z06 cams need yellow beehive springs (50 bucks) or PAC beehives (100+). if you run carb gm makes a distributer for the front that accepts a sbf dizzy or you can just run the msd timing box (which is cheaper and easier) and adjust timing with a laptop. Easy as cake to run these. Any other questions, message me.
Big Poppa (Chris)
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Post by The Nose on Sept 9, 2011 4:18:05 GMT -5
Thanks joker. Will I need to buy a msd 6ls box or something similar to it in order for it to operate properly?
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joker14
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Post by joker14 on Sept 9, 2011 7:03:32 GMT -5
Ive been reading this post and maybe I missed it but are you running old style turbo 350/400 with and a spacer for the torque converter? I know the bellhousing bolts up but I read this right after 12 pages there is a space for the converter. Thanks for any info. No spacers needed, i have gone through 12 motors already and have not needed any. If you get the flat 6.0 flexplates the require an adapter and longer bolts. Stick to the 5.3 stuff and all you need is the $40 hub spacer. i run a th350
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joker14
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Post by joker14 on Sept 9, 2011 7:06:37 GMT -5
The ideal motor would be an early pre-2001 lq4/9 with iron heads to reduce chance of warpage of heads due to heat. Any classic gm trans will bolt up, Hughes makes a spacer. All you have to do is elongate one of the torque converter holes on the ls flywheel. These motors are just like a sbc or any other motor when it comes to heat but ls motors can from the factory take more abuse than a factory sbc. Don't be afraid torun these hard. Junkyard 5.3 plus a z06 cam or small torque cam 220's duration will be fine. Keep factory motors redline around 6k. Z06 cams need yellow beehive springs (50 bucks) or PAC beehives (100+). if you run carb gm makes a distributer for the front that accepts a sbf dizzy or you can just run the msd timing box (which is cheaper and easier) and adjust timing with a laptop. Easy as cake to run these. Any other questions, message me. Big Poppa (Chris) I would not run those POS iron heads if they were the last heads on the planet. They were coolant leaking POS since the day they were made, theres a reason they only made 1800 sets of them. Lets me ask how many of these carbed engines have you built? From the information your giving does not seem to me you have built many and definately not derbied any.
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Post by bigpoppa on Sept 9, 2011 13:22:13 GMT -5
Dont come in here and insult me. I haven't built any with the iron heads but I do know aluminum heads don't like to get near as hot. I have built 3 of them and all with no problems, 2 being carbed. I've got an L92 headed lq4 in my driver 73 2dr impala with a th350 behind it. You don't know me or what I've done, so have a little respect before you bash.
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Post by Deleted on Sept 9, 2011 14:09:31 GMT -5
Ive been reading this post and maybe I missed it but are you running old style turbo 350/400 with and a spacer for the torque converter? I know the bellhousing bolts up but I read this right after 12 pages there is a space for the converter. Thanks for any info. No spacers needed, i have gone through 12 motors already and have not needed any. If you get the flat 6.0 flexplates the require an adapter and longer bolts. Stick to the 5.3 stuff and all you need is the $40 hub spacer. i run a th350 Thanks for the info
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Post by The Nose on Sept 9, 2011 14:11:15 GMT -5
Do I have to buy a msd 6ls box?
Happy to hear a th350 will bolt to thought have to buy a new trans
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joker14
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Post by joker14 on Sept 10, 2011 0:26:26 GMT -5
Do I have to buy a msd 6ls box? Happy to hear a th350 will bolt to thought have to buy a new trans In this configuration you do. Almost all of the budget minded derby guys are going to need one. You can run all the factory stuff and try and make it work but i tried that. Not going to work for a derby. Tried to package up the distributor stuff and kinda pricey for and im never going to get it ito the types of cars i drive and get good rad clearance. So far the MSD/Edelbrock package is clean, simple, cheap, and reliable and runs dam cool for the little effort you have to put in them.
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bigr
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Post by bigr on Sept 11, 2011 22:32:04 GMT -5
Is the msd box that comes with the kit the 6ls or do you buy that separate. What will I need to put the Ls1 heads on a 5.3? pushrods, lifters, etc. Will the 5.3 parts work or will I need the Ls1 parts? Thanks
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joker14
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Post by joker14 on Sept 12, 2011 8:51:30 GMT -5
The box comes with the kit, do some reading on the stuff in jegs summit or whatever. All parts swap. 5.3 to 5.7 Buy head bolts and gaskets to do the swap.
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Post by shoe81 on Sept 19, 2011 16:20:02 GMT -5
Finally got mine done and installed. Sounds incredible. Mounts ign "protector" Ended up using wider plate P/S lines
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Post by oldiron4ever on Sept 30, 2011 19:35:06 GMT -5
this thread has piqued my interest in these motors.just have a few questions im hoping someone can answer.what year 5.3 's are you guys using? will sbc 350 headers fit these motors and with the igntion box is a laptop needed to program or setup the timing? have zero experience with an igniton box so i have no idea how they work.thanks
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