Short block options
Thread Starter
TECH Fanatic
Joined: Jun 2014
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Short block options looking into forged short blocks to upgrade my ly6/whipple 2.9. What do think is the best option for around 5k ? Ls3 416? Iron 408? I’d love an ls3 based 427 but I’ve read it’s not a good idea with boost. I was also thinking of buying a new block and putting it together myself but I. Not sure I would save any money
TECH Regular
Joined: Dec 2014
Posts: 484
Likes: 18
From: Emory Texas currently
I've tried it several different ways and even with good deals on parts and all with the cost of machine shops today you really can't build one or have a machine shop bore,stroke,deck,mill,assemble,balance,etc for what places like thompson or Texas speed sell there ready to go short blocks for. But I would only buy from a reputable sponsor on here so u don't get some eBay half *** short block. I love the 408 or the 383 depends on price I guess but if u can afford it try and be different for the cool factor
When using the blower you are going to make the power that the blower allows. We recommend a stock stroke build for an increased life and strength of the motor. There is some to gain by going stroker in the way of out of boost TQ but the advantge/disadvantage is really a personal preference. Give us a call if we can help in any way, We do have tons of options.
Thank you for the shout out Dimeomboost!
Thank you,
Kyle
Thompson Motorsports
Thank you for the shout out Dimeomboost!
Thank you,
Kyle
Thompson Motorsports
Thread Starter
TECH Fanatic
Joined: Jun 2014
Posts: 1,533
Likes: 12
It goes pretty good now @13 lbs .be a real pain in the *** to go turbo. It’s set up really nice now with an afco heat exchanger etc.. the SBE is the only thing stopping me from turning it up. . im building a 5.3/s480 right now for a friend. Hopefully I don’t fall in love with it and end up wanting to go turbo. The only kit I’ve seen for g body’s is the cx twin kit
Thread Starter
TECH Fanatic
Joined: Jun 2014
Posts: 1,533
Likes: 12
When using the blower you are going to make the power that the blower allows. We recommend a stock stroke build for an increased life and strength of the motor. There is some to gain by going stroker in the way of out of boost TQ but the advantge/disadvantage is really a personal preference. Give us a call if we can help in any way, We do have tons of options.
Thank you for the shout out Dimeomboost!
Thank you,
Kyle
Thompson Motorsports
Thank you for the shout out Dimeomboost!
Thank you,
Kyle
Thompson Motorsports
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TECH Junkie
Joined: Jul 2015
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It goes pretty good now @13 lbs .be a real pain in the *** to go turbo. It’s set up really nice now with an afco heat exchanger etc.. the SBE is the only thing stopping me from turning it up. . im building a 5.3/s480 right now for a friend. Hopefully I don’t fall in love with it and end up wanting to go turbo. The only kit I’ve seen for g body’s is the cx twin kit
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Verdad Gallardo Thread Starter
TECH Fanatic
Joined: Jun 2014
Posts: 1,533
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lol I’ll have to see how it works out. I have spoken to someone on here that had a whipple and went turbo. I seemed to remember him missing the instant torque.i wonder what I could get for my 2.9?
I switched from a Procharger D1SC on an LS2/402 stroker. It ran great and had traction off the line and kept pulling and pulling until redline, like a Centri should...
My TT Iron 408 is a blast to drive and a totally different animal. However, this is a street car and the turbo takes much more maintenance, produces a lot of heat and needs tweaking on tuning every so often with climate changes and especially elevation changes. I'm at 4500ft and occasionally to Sacramento/ Bay area where the car turns into a totally different animal. I mean, it feels like it picks up an easy 150HP/TQ+ lol. (exaggerated I know)
I'd go back to a SC any day as it's simple and predictable. If it were a track car, I'd run my exact setup as it's able to change from 500WHP to 1100WHP with fuel, plugs and tuning.
As always, give and take, there's always a compromise...
My TT Iron 408 is a blast to drive and a totally different animal. However, this is a street car and the turbo takes much more maintenance, produces a lot of heat and needs tweaking on tuning every so often with climate changes and especially elevation changes. I'm at 4500ft and occasionally to Sacramento/ Bay area where the car turns into a totally different animal. I mean, it feels like it picks up an easy 150HP/TQ+ lol. (exaggerated I know)
I'd go back to a SC any day as it's simple and predictable. If it were a track car, I'd run my exact setup as it's able to change from 500WHP to 1100WHP with fuel, plugs and tuning.
As always, give and take, there's always a compromise...
I switched from a Procharger D1SC on an LS2/402 stroker. It ran great and had traction off the line and kept pulling and pulling until redline, like a Centri should...
My TT Iron 408 is a blast to drive and a totally different animal. However, this is a street car and the turbo takes much more maintenance, produces a lot of heat and needs tweaking on tuning every so often with climate changes and especially elevation changes. I'm at 4500ft and occasionally to Sacramento/ Bay area where the car turns into a totally different animal. I mean, it feels like it picks up an easy 150HP/TQ+ lol. (exaggerated I know)
I'd go back to a SC any day as it's simple and predictable. If it were a track car, I'd run my exact setup as it's able to change from 500WHP to 1100WHP with fuel, plugs and tuning.
As always, give and take, there's always a compromise...
My TT Iron 408 is a blast to drive and a totally different animal. However, this is a street car and the turbo takes much more maintenance, produces a lot of heat and needs tweaking on tuning every so often with climate changes and especially elevation changes. I'm at 4500ft and occasionally to Sacramento/ Bay area where the car turns into a totally different animal. I mean, it feels like it picks up an easy 150HP/TQ+ lol. (exaggerated I know)
I'd go back to a SC any day as it's simple and predictable. If it were a track car, I'd run my exact setup as it's able to change from 500WHP to 1100WHP with fuel, plugs and tuning.
As always, give and take, there's always a compromise...
Thread Starter
TECH Fanatic
Joined: Jun 2014
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well I read all these ls3 horror stories . Seems like 15lbs with a PD blower is pushing it. I’ve been @13-14lbs for a while now without issues, but my tune is pretty good and water/ meth I’m sure helps. Most of the horror stories I’ve read seem to be tune / fuel related
Restricted User
Joined: Mar 2014
Posts: 7,192
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From: Ohio
Compression ratio on an LS3 is a full point higher. 10.7:1 vs 9.6:1. That's going to be a majority of the issues with a blower. If they're not running E85, they're on thin ice.