Blown 427
Blown 427 Hey guys I am new to the forum but let me fill you in on what I have and what I am looking to do. I am hoping some of you more experienced guys can lead me in the right direction prior to me buying the wrong parts.
I have an '01 Sierra C3 AWD GMC truck with the 6.0L engine. I currently have an ATI P1SC on it running 9lbs of boost. I hurt the motor the other day so I am planning a new motor.
I contacted Lingenfelter to work me up a quote on a balanced and blueprinted 427 shortblock with a cam for a supercharger. I am thinking of running the new AFR heads but don't know what size chambers would be best. I am also going to upgrade my supercharger to a D1SC and would like to run about 12lbs of boost. I know my 4L65E will have to be built and I plan on installing a 3000 stall converter at the same time.
Do you guys have any suggestions on this setup? Anyone point out any flaws in my proposed build? Any suggestions on fuel injector size? Any good LS1Edit tuners out there that could help tune this engine? Thanks for the input.
Tim
I have an '01 Sierra C3 AWD GMC truck with the 6.0L engine. I currently have an ATI P1SC on it running 9lbs of boost. I hurt the motor the other day so I am planning a new motor.
I contacted Lingenfelter to work me up a quote on a balanced and blueprinted 427 shortblock with a cam for a supercharger. I am thinking of running the new AFR heads but don't know what size chambers would be best. I am also going to upgrade my supercharger to a D1SC and would like to run about 12lbs of boost. I know my 4L65E will have to be built and I plan on installing a 3000 stall converter at the same time.
Do you guys have any suggestions on this setup? Anyone point out any flaws in my proposed build? Any suggestions on fuel injector size? Any good LS1Edit tuners out there that could help tune this engine? Thanks for the input.
Tim
TECH Resident
Joined: Aug 2003
Posts: 948
Likes: 0
From: orlando, florida
I`m thinking the D1 and 12psi on a 427 is gonna be a little small you`d be better off going to the F1 with a front mount intercooler. As far as your fuel you most likely need to look at twin intank pumps, new feed line, a set of aftermarket fuel rails and 50lb injectors or maybe bigger (Don`t remember what the biggest they make is now). The AFR heads would work well i`d go with their strip heads (for the big bore) with the 225cc runners and the 76cc combustion chambers. Have lingenfelter do the tuning also.
I spoke with ATI and they suggested the D1 but I will look at the other model. I am already running a front mount intercooler that came with the ATI kit for my truck.
I am going to have to find a tuner in south eastern US. I really don't have the time to send my truck to Lingenfelter for the tune and they have no experience with the ATI or the AFR heads. I asked for technical assistance on this part and they didn't seem interested. Any suggestions on a shop or person that might be willing to come to my location would be appreciated. I do have LS1Edit and an 4WD dyno available.
I wasn't planning on the larger line, twin pumps, and aftermarket fuel rail. Do you really think this will be necessary? Perhaps I should just run 9lbs of boost.
Thanks for the comments.
I am going to have to find a tuner in south eastern US. I really don't have the time to send my truck to Lingenfelter for the tune and they have no experience with the ATI or the AFR heads. I asked for technical assistance on this part and they didn't seem interested. Any suggestions on a shop or person that might be willing to come to my location would be appreciated. I do have LS1Edit and an 4WD dyno available.
I wasn't planning on the larger line, twin pumps, and aftermarket fuel rail. Do you really think this will be necessary? Perhaps I should just run 9lbs of boost.
Thanks for the comments.
TECH Senior Member
Joined: Nov 2001
Posts: 10,341
Likes: 1
Originally Posted by sierrac3_s2000
I wasn't planning on the larger line, twin pumps, and aftermarket fuel rail. Do you really think this will be necessary? Perhaps I should just run 9lbs of boost.
Thanks for the comments.
Thanks for the comments.
TECH Resident
Joined: Aug 2003
Posts: 948
Likes: 0
From: orlando, florida
A supercharged 427 with 12psi of boost is in big dog land. your talking 700-800rwhp. Anything above about 650rwhp you need to replace the lines and rails And IMO you`ll be close to that N/A. Your already droping, what $15000 for the lingen. 427? If you skimp on the maybe $350 worth of parts (rails and lines), and maybe $300 for the twin pumps. You might as well give that money to me because your gonna gernade the motor. Fuel system is not the place to skimp theres alot of people on here that have toasted there motor from lack of fuel. As for Dyno tuning, where do you live? And i don`t think a 4wheel dyno is needed you might be able to pull the front drive shaft I don`t know for sure if you can still do that on the new trucks. But on my 99 k1500 you could just lock it into 4wheel and run it rear wheel drive.
Originally Posted by sierrac3_s2000
I am going to have to find a tuner in south eastern US. Any suggestions on a shop or person that might be willing to come to my location would be appreciated.
OK let me see if I can reply to all this. I didn't say I wouldn't do the fuel upgrade I just didn't plan for it. You are right, I don't want to skimp on anything that might cause me failure. This is why I posted so that you guys could let me konw if I was missing anything. Do you guys have any particular recommendations on fuel rails and in-tank pumps?
Sorry I didn't give my location, I am in southwest GA. I have a brand new dynojet 4WD dyno available. I have to run my truck on a 4WD dyno because it is AWD from the factory and the computer will not allow it to run with the front driveshaft out.
And finally as for the cost I do not have my estimate back from Lingenfelter yet. It was supposed to be emailed to me yesterday. I hope it arrives shortly. I am only having them build the short block. I will provide the heads and I will have to find someone to do the tuning so the price should be under $10,000 I hope. My budget right now is about $15,000.00 for this motor but I would rather be closer to $10,000 if possible. That is why I wanted to get your input so that I don't waste money buying things twice.
Sorry I didn't give my location, I am in southwest GA. I have a brand new dynojet 4WD dyno available. I have to run my truck on a 4WD dyno because it is AWD from the factory and the computer will not allow it to run with the front driveshaft out.
And finally as for the cost I do not have my estimate back from Lingenfelter yet. It was supposed to be emailed to me yesterday. I hope it arrives shortly. I am only having them build the short block. I will provide the heads and I will have to find someone to do the tuning so the price should be under $10,000 I hope. My budget right now is about $15,000.00 for this motor but I would rather be closer to $10,000 if possible. That is why I wanted to get your input so that I don't waste money buying things twice.
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On The Tree
Joined: May 2002
Posts: 105
Likes: 0
From: Bryan,. TX
Thats going to be quite difficult for that price. A complete fuel system to support that much power, pump/lines/regulator/billet rails, is $1100 from LS1Speed. Going to need big injectors, $65-85 each from 57-85lbs, D1SC upgrade from P1SC by ATI is $1100, AFR heads are going to be around $2500 for the 225cc with dual springs. Get Reichard sure grip pulley as there is no way that a stock one would hold well. ASP does not make a 8 rib systemfor the trucks yet although it could be done custom. I would put E-fans in, $400 for the flexalite, get rid of the stock airtube and do a easy custom 4" intake tube. It adds up very quickly.
I have 42lb SVO with a boostapump on my C3 with an ATI P1SC and H/C, I have room for alittle more but with a 427 and the boost you want, fuel is definitely going to be needed. Do not want to go lean and grenade the motor. Also, If you are going to go all out, get the Griffin IC that is on sale for $500, PSJ model, it will fit right up where the stock one and is 100 times better, just need to cut the silicone tubing and make some brackets to mount it. I measured it out already. The 4L65E is strong, but its going to get killed by a 427 with a D1SC. Mine is pretty much going out now with a H/C and P1SC. That is $2400 for a completely built one, plus, a good Yank truck converter is $700. All in the need of speed
I have 42lb SVO with a boostapump on my C3 with an ATI P1SC and H/C, I have room for alittle more but with a 427 and the boost you want, fuel is definitely going to be needed. Do not want to go lean and grenade the motor. Also, If you are going to go all out, get the Griffin IC that is on sale for $500, PSJ model, it will fit right up where the stock one and is 100 times better, just need to cut the silicone tubing and make some brackets to mount it. I measured it out already. The 4L65E is strong, but its going to get killed by a 427 with a D1SC. Mine is pretty much going out now with a H/C and P1SC. That is $2400 for a completely built one, plus, a good Yank truck converter is $700. All in the need of speed
MHLY01,
I have spoken with you long ago. My screen name was C3Sierra. We actually ended up building nearly identical trucks. Mine is Pewter with Centerline wheels and I do car audio competitions as well.
Anyhow, I got all my estimates back today and you are correct. Looks like about $18500.00 for all the work and getting it installed. I will still have to pay someone to tune it so I guess it will end up being close to $20,000.00. That is about $5000.00 more than I had to spend so I guess I am going to have to figure out if I want to suck up the last $5000.00 or maybe go N/A at first and add the boost later.
I already have the flex-a-lite fans and I already have custom intercooler piping and a cold air intake pipe that are ceramic coated so that much is done already.
Primarily this truck is a show vehicle but it does get about 5000 miles a year on the road. I also take it to the track every now and again.
I have to get the stock motor and trans out of the truck now and figure out which way I am going to go. I really appreciate all the help everyone here has given me.
Tim
I have spoken with you long ago. My screen name was C3Sierra. We actually ended up building nearly identical trucks. Mine is Pewter with Centerline wheels and I do car audio competitions as well.
Anyhow, I got all my estimates back today and you are correct. Looks like about $18500.00 for all the work and getting it installed. I will still have to pay someone to tune it so I guess it will end up being close to $20,000.00. That is about $5000.00 more than I had to spend so I guess I am going to have to figure out if I want to suck up the last $5000.00 or maybe go N/A at first and add the boost later.
I already have the flex-a-lite fans and I already have custom intercooler piping and a cold air intake pipe that are ceramic coated so that much is done already.
Primarily this truck is a show vehicle but it does get about 5000 miles a year on the road. I also take it to the track every now and again.
I have to get the stock motor and trans out of the truck now and figure out which way I am going to go. I really appreciate all the help everyone here has given me.
Tim
On The Tree
Joined: May 2002
Posts: 105
Likes: 0
From: Bryan,. TX
Hey, can you send me some pics of your truck and also of the intake piping and cold air intake pipe. I want to see how you did yours before I do some more to mine. I want to change it up.
You may want to check with Chris at AP Engineering. he is having a special on short blocks right now and could build you a 6.0L one pretty reasonable.
You may want to check with Chris at AP Engineering. he is having a special on short blocks right now and could build you a 6.0L one pretty reasonable.
