427ci and 429ci engine differences?

[jrpxxii]

Originally Posted by qtr-camaro ss

I'm sure that the guys at IPS motorsport know what they are doing..
the engine thing was not there mistake because they did not build it there..

btw I like your car alot ..

Thanks for the compliment on my car. Now that I know who is doing your car, I can say you are in good hands as IPS is a very reputable shop of some bada$$ cars. As to the engine issue, I still cant understand how this happened as I am guessing you had another outside source do the engine and then sent to IPS. The guys at IPS know what they are doing so I would listen to what they have to say about the rest of your car.

[90503]

Just curious...Pretty sure the OP said the cast iron motor was more money...I would have thought a built aluminum engine would be the more pricier of the two??? dunno...

[oldschool69]

Originally Posted by EMB135Driver

this is easy....2 cubic inches is the difference.

Yea! I think it's a trick question.

[L36L72LS3]

Originally Posted by qtr-camaro ss

i paid more than 13 grand including labor

I think you're engine guy is blowing smoke up your cylinder.

[PfadtRacing]

Originally Posted by JimE

And your front suspension was designed around what? ..the current motor? In which case, you will STILL need an upgrade as the new motor is heavier.

Not to get into a battle here, but with our drag coilover package you can adjust your ride height to compensate for the heavier engine. With an extra 100lbs in the front of the car we wouldn't suggest changing spring rates, especially considering we want the front end to run a very low spring rate for best drag performance. He's got enough suspension under the car at this point that IPS can dial in the car properly for the weight of the new block.

IPS Motorsports does excellent work. I wouldn't hesitate to call them for any of your Camaro needs. The OP may be a little foggy on the final technical details of his build, but IPS is certainly not in the business of taking advantage of their customers and we're very sure they're treating him right.

[LOWDOWN]

A twin-turbo iron-block LSX-based engine will add a LOT more than 100 front-end lb...
Twin-turbo 454-based LSX, as per Jannetty's experience, may NOT be the correct high-boost recipe. Better to start with the LSX 376 block (more material between bores), bore it very little and stroke it to 420-something (if 420-something is desired)...imvho. The smaller the bore, the stronger the block, affording you the possibility of more boost to make even more power.
Regardless, the block should be (or should have been) sonic-tested to assure its integrity BEFORE building.

[S-eatin-grin]

Originally Posted by LOWDOWN

A twin-turbo iron-block LSX-based engine will add a LOT more than 100 front-end lb...
Twin-turbo 454-based LSX, as per Jannetty's experience, may NOT be the correct high-boost recipe. Better to start with the LSX 376 block (more material between bores), bore it very little and stroke it to 420-something (if 420-something is desired)...imvho. The smaller the bore, the stronger the block, affording you the possibility of more boost to make even more power.
Regardless, the block should be (or should have been) sonic-tested to assure its integrity BEFORE building.

As always....good post

[Coyotekiller]

If I just dropped $13k for upgrades, I would know everything about what I'm doing to my car. But then again, I also don't have that much dough just laying around to blow on my car either...

[Thyshallsmite]

Originally Posted by LOWDOWN

A twin-turbo iron-block LSX-based engine will add a LOT more than 100 front-end lb...
Twin-turbo 454-based LSX, as per Jannetty's experience, may NOT be the correct high-boost recipe. Better to start with the LSX 376 block (more material between bores), bore it very little and stroke it to 420-something (if 420-something is desired)...imvho. The smaller the bore, the stronger the block, affording you the possibility of more boost to make even more power.
Regardless, the block should be (or should have been) sonic-tested to assure its integrity BEFORE building.

See i heard about the 1 that blew up too, however GM says this engine does really well with boost and is designed for high boost, so thinking that one that blew is just a fluke. After all Nelson racing does a lot of twin turbo with the LSX454 with no issue.

[LOWDOWN]

Ultimately, "it's ALL in the tune...and componentry...and attention to assembly detail...and machining...and..."

[Rip]

Originally Posted by Thyshallsmite

See i heard about the 1 that blew up too, however GM says this engine does really well with boost and is designed for high boost, so thinking that one that blew is just a fluke. After all Nelson racing does a lot of twin turbo with the LSX454 with no issue.

Yep, they actually advertise it that way, and then if it blows due to a manufacturing defect you are SOL.

[BBQdDude]

The dudes over at IPS ROCK. They will take care of you. I have been to them many times. I think the OP is just a little fuzzy on the details is all (not meant to offend OP).

[qtr-camaro ss]

Originally Posted by jrpxxii

Thanks for the compliment on my car. Now that I know who is doing your car, I can say you are in good hands as IPS is a very reputable shop of some bada$$ cars. As to the engine issue, I still cant understand how this happened as I am guessing you had another outside source do the engine and then sent to IPS. The guys at IPS know what they are doing so I would listen to what they have to say about the rest of your car.

They ordered the engine not me .. Its all there build. And I'm doing whatever they are recommending ..


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[qtr-camaro ss]

Originally Posted by Coyotekiller

If I just dropped $13k for upgrades, I would know everything about what I'm doing to my car. But then again, I also don't have that much dough just laying around to blow on my car either...

I know what I'm doing .. But by there is se thing went wrong so they are changing the setup. That's why I'm asking here.

Btw I spent a lot more than 13k. By saying 13k, I'm talking about the engine not the whole project


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