Firehawk LT4s

[2000LS1Z28]

Originally Posted by FormulaLT1

Also Typical LT1's run low 14's , high 13's. while typical LS1 runs mid 13's to low 13's. Not a huge margin there. Typical 6 speed stock LS1's dyno around 300 mark while typical 6 speed stock LT1's dyno around 250 - 260. Thats not a lot to make up for.

I disagree. A few tenths of a sec. isn't as easy as alot of people make it out to be. The LS1 motor typically dynos over 30whp more then an LT1. I dunno why people say that the LT1 motor makes more rwtq earlier on in the powerband, cause judging by my dyno run I had 300rwtq at 2500 rpms on.

Of course if you wanna mod it's probably cheaper to go with the LT1, but I do honestly think that the LS1 is more reliable (No optispark bs to deal with).

I've raced alot of LT1's and the races weren't close. They had mods, I have mods, but the results were the same.

[FormulaLT1]

Originally Posted by 2000LS1Z28

I disagree. A few tenths of a sec. isn't as easy as alot of people make it out to be. The LS1 motor typically dynos over 30whp more then an LT1. I dunno why people say that the LT1 motor makes more rwtq earlier on in the powerband, cause judging by my dyno run I had 300rwtq at 2500 rpms on.

Of course if you wanna mod it's probably cheaper to go with the LT1, but I do honestly think that the LS1 is more reliable (No optispark bs to deal with).

I've raced alot of LT1's and the races weren't close. They had mods, I have mods, but the results were the same.

To each there own but Opti aren't as huge a issue as most people make them out to be generally they go around 100K (which is alot of mile before it becomes a issue). This is ofcourse assuming you don't have a crappy water pump. Also I can give you a million different examples on how to drop a few tenths off a stock 14 second car. Once you start getting into 12's and lower. Yes it is more difficult to drop tenths but thats not the case on stock LT1. I have also raced a ton of LS1 from when I first got my car til now and even in near stock form 0 - 100MPH was very very close.

[TransAm87]

and that good old iron block lasts longer than aluminum..actually I don't know if thats true but I also like the less flashy styling of the LT1's over the LS1's..and of course I love third gens the best..

[camaromaniac]

Originally Posted by TransAm87

and that good old iron block lasts longer than aluminum..actually I don't know if thats true

that is true. the iron block is heavier but stronger

[TransAm87]

^^^sweet^^^

[Mr. Luos]

Originally Posted by TransAm87

and that good old iron block lasts longer than aluminum..

This is why you build an iron block 402 LSx.

[doodad]

Originally Posted by FormulaLT1

Also Typical LT1's run low 14's , high 13's. while typical LS1 runs mid 13's to low 13's. Not a huge margin there. Typical 6 speed stock LS1's dyno around 300 mark while typical 6 speed stock LT1's dyno around 250 - 260. Thats not a lot to make up for.

But still LS1 bigger and newer.. aslo 1 SECOND is a great time on track. for example cobras are like low-mid-high 12s. which means they are 1 sec. faster than LS1s.. and this makes them TERMINATOR.. and l believe they are more relaible than LT1s.. but about sound, l think LT1 gives much much more aggressive sound then LS1s..

[FormulaLT1]

Originally Posted by doodad

But still LS1 bigger and newer.. and l believe they are more relaible than LT1s.. but about sound, l think LT1 gives much much more aggressive sound then LS1s..

Bigger how so?. As for more reliable, any car thats kept in good tune and has regular maintance will treat you good as well. Both engines have been known for having specific issue's but I can honestly say that I have never had a problem directly related to my Engine. I have had issue's with fuel injectors and my fuel pump. I have had issue's with a fuel injector clip coming loose and setting a code. I have had issue's with my air pump blowing a fuse (which the air pump is scrapped now) but nothing directly linked to my LT1 being unreliable. Alot of the supporting equipment is much more unreliable than a LT1 but alot of those same components are also used on LS1's. I have said this a million times but I think it is the truest thing I know about the comparison. Out of the box, LS1 is definetly superior power wise but LT1 easily equals the playing field and is cheaper to mod. Also as has been mentioned you can take the cast iron block that the LT1 uses farther cause of the strength difference between Iron and aluminum. To most people this is a important issue cause as most people find out once they get the performance bug. Your never done making her faster.

[TransAm87]

But still LS1 bigger and newer..

bigger? not at all, both LS1's and LT1's are 5.7L

[Dyno247365]

Originally Posted by TransAm87

bigger? not at all, both LS1's and LT1's are 5.7L

AHA!!!!!!

the LT1 is a 350 and the LS1 is a 346, pwned!

(doesn't know for sure, someone back me up before I look like an ass)

[Mr. Luos]

You are right.
LT1 is an actual 350.
LS1 is a 346.

Of course...there is always the 402 LSx.

[TransAm87]

well good, cause I was backing up the LT1, so its actually bigger than the LS1, sweet..

[Dyno247365]

Originally Posted by Mr. Luos

You are right.
LT1 is an actual 350.
LS1 is a 346.

Of course...there is always the 402 LSx.

Where did you find that engine anyway?

To stay ontopic, the LT4 is a 350 also right? Just built with better internals than an LT1.

[FormulaLT1]

The LT4 is exactly the same block as used on all Corvette (which is the 4 bolt main 350 LT1 cast marked 327). If is just factory hot rodded. Here is a page with the differences http://www.grandsportregistry.com/lt1vslt4.htm

[Mr. Luos]

Originally Posted by Quicksilver_28

Where did you find that engine anyway?

Find???
It is a GM truck block. LQ9 block, LS1 internals.
The newer GM blocks have interchangable parts.