$2000 for performance upgrades.
Thread Starter
7th Gear
Joined: Oct 2011
Posts: 7
Likes: 0
$2000 for performance upgrades.
Hello everyone. I have an 84vette with a 350 motor that runs decent. The motor gave out on it last year, and I had to replace it. My current motor was dyno'd at 371hp. Now, The crossfire engine had 205, or 210, I believe, and yes I do feel a little difference, I dont feel like I got the big boost in speed that I SHOULD have seen.
My car does have a 2.73 gear and Im hoping/assuming that this is the reason im not utilizing all of my horsepower? I am about to have roughly 2k to spend, and was thinking about upgrading to a 3.73 gear.
Now, Im not a technical car guy, so keep things simple for me haha. I have very basic knowledge of mechanics.
Also, this car WAS my daily driver for a while, but it no longer is. I can pretty much do whatever to it, and not have to worry about it being reliable 100% of the time.
If you were in my situation, and you wanted to make it run faster, what would you spend the 2k on? Thanks!
My car does have a 2.73 gear and Im hoping/assuming that this is the reason im not utilizing all of my horsepower? I am about to have roughly 2k to spend, and was thinking about upgrading to a 3.73 gear.
Now, Im not a technical car guy, so keep things simple for me haha. I have very basic knowledge of mechanics.
Also, this car WAS my daily driver for a while, but it no longer is. I can pretty much do whatever to it, and not have to worry about it being reliable 100% of the time.
If you were in my situation, and you wanted to make it run faster, what would you spend the 2k on? Thanks!
Thread Starter
7th Gear
Joined: Oct 2011
Posts: 7
Likes: 0
The motor I put in was pre-rated at 371hp. I haven't done any mods to it. I did feel an increase in power, but not what I assumed about 175hp would feel like. My dad has an 03vet with 350hp that can outrun my car.
Torque converter + gears, what exactly would I expect to get out of these?
I have a feeling swapping gears is going in the right direction. Going from a 2.73 to 3.73, what kind of performance increase should I expect?
Torque converter + gears, what exactly would I expect to get out of these?
I have a feeling swapping gears is going in the right direction. Going from a 2.73 to 3.73, what kind of performance increase should I expect?
Drifting
Joined: Dec 2007
Posts: 1,647
Likes: 4
From: Argillite KY
2.73 to 3.73, what kind of performance increase should I expect?
The motor I put in was pre-rated at 371hp
Burning Brakes
Joined: Nov 2008
Posts: 995
Likes: 1
From: Naples Campania
What trans does it have? I'm going to guess that it has the 6-speed with that ratio.
I don't know if you would be happy with going that short on the gears. You'll be hammering into 2nd and 3rd so fast you will lose some of the fun.
Also, what motor is it? It sounds like that 371 HP was measured at the crank. I'm going to take a wild guess at a bored out ZZ4 (only because that's what I have now).
2K probably won't get you too far into the motor. I would say add a little more to that and get a Cam/Head combo and get a really good tune on it.
I don't know if you would be happy with going that short on the gears. You'll be hammering into 2nd and 3rd so fast you will lose some of the fun.
Also, what motor is it? It sounds like that 371 HP was measured at the crank. I'm going to take a wild guess at a bored out ZZ4 (only because that's what I have now).
2K probably won't get you too far into the motor. I would say add a little more to that and get a Cam/Head combo and get a really good tune on it.
Drifting
Joined: Oct 2005
Posts: 1,913
Likes: 48
From: Angier nc
I would want more details on the engine for starters.Does it still have the factory exhaust?
Gears and converter will help you but not knowing all of the details on what you have I am hesitant to make a suggestion.
Do you have a parts list and dyno sheet for YOUR motor?The tune plays a big role as well.
Gears and converter will help you but not knowing all of the details on what you have I am hesitant to make a suggestion.
Do you have a parts list and dyno sheet for YOUR motor?The tune plays a big role as well.
Thread Starter
7th Gear
Joined: Oct 2011
Posts: 7
Likes: 0
R700 is the transmission, I believe. Automatic. I did have a dynosheet with all of the information that I will try to find for you guys because in all honesty, I'm not terribly familiar with my engine's setup. I had the engine built from a company called tristar engines, I believe. It was gonna be my daily driver for a while, so I didn't want it to be tooo radical. We opted for the 371hp setup.
Ill try to find the dynosheet, and hopefully that will help you guys help me.
Ill try to find the dynosheet, and hopefully that will help you guys help me.
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Melting Slicks
Joined: Dec 2009
Posts: 2,226
Likes: 284
That replacement engine probably makes power where the crossfire intake won't allow it. Its got to be a mismatched combo, extensive porting of the intake or upgrading (renegade or tradtional type 4bbl intake w/ a 2bbl. tbi unit) to another type will help. The cam has to match that combo too. You could also carb it...
Drifting
Joined: Dec 2007
Posts: 1,647
Likes: 4
From: Argillite KY
You could also carb it.
The best looking chevy intake system would be carbs, like this. I really want one. Could anyone lend me about $4500.00.
Why anyone would want to get rid of injection for a semi-regulated gas leak is beyond me.
Last edited by 1963SS; Oct 15, 2011 at 07:39 PM.
Thread Starter
7th Gear
Joined: Oct 2011
Posts: 7
Likes: 0
It actually is carbed. Can't remember our exact reason, but we didn't want to rebuild the crossfire, and I think we thought this was the best bang for the buck. I'm not sure if it WAS the best choice, but it was good for the time.
Would the original parts, anything, be restricting my motor from utilizing its hp? Like I've said before, I always assumed it was the gears, and I'm still hoping it is haha. But you guys would without a doubt know better than me!
Would the original parts, anything, be restricting my motor from utilizing its hp? Like I've said before, I always assumed it was the gears, and I'm still hoping it is haha. But you guys would without a doubt know better than me!
Race Director
Joined: Jan 2002
Posts: 12,261
Likes: 85
From: O'Fallon Missouri
Drifting
Joined: Oct 2005
Posts: 1,913
Likes: 48
From: Angier nc
What intake and carb?Are you running headers or manifolds?What type of distributor and what is the timing?
Of course that dyno sheet and some cam/head/compression specs would help a lot.I am assuming you have done a thorough tune up to eliminate that??
Of course that dyno sheet and some cam/head/compression specs would help a lot.I am assuming you have done a thorough tune up to eliminate that??
Race Director
Joined: Nov 2003
Posts: 12,220
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From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
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Thread Starter
7th Gear
Joined: Oct 2011
Posts: 7
Likes: 0
Like I said, im gonna get the dyno sheet that came with the motor I received. I dont have it off hand but i'll have to track it down, and i'll be able to supply more info
Thanks for the comments and help so far guys.
Thanks for the comments and help so far guys.
Race Director
Joined: Jan 2002
Posts: 12,261
Likes: 85
From: O'Fallon Missouri
Greg'
Melting Slicks
Joined: Apr 2007
Posts: 2,616
Likes: 111
If an '03 C5 equipped with a stock LS1 whooped you, not just barely walked away, you certainly do not have anywhere near 371 at the crank my friend.....and this thing would be extremely noticebly faster than the stock crossfire mill, that's for sure...
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,062
From: altered state
St. Jude Donor '05
For some reason cant connect to Tri Stars site to see if his motor could be found.
OP we need specifics on your motor.
What compression, which cam, head casting # etc.
With a carbed 371hp it should feel night and day over your crossfire.
Somethings amiss somewhere but need more info before spending your money. May need to contact them to figure out what you have.
OP we need specifics on your motor.
What compression, which cam, head casting # etc.
With a carbed 371hp it should feel night and day over your crossfire.
Somethings amiss somewhere but need more info before spending your money. May need to contact them to figure out what you have.
Racer
Joined: Mar 2007
Posts: 306
Likes: 0
From: New Hampshire
For some reason cant connect to Tri Stars site to see if his motor could be found.
OP we need specifics on your motor.
What compression, which cam, head casting # etc.
With a carbed 371hp it should feel night and day over your crossfire.
Somethings amiss somewhere but need more info before spending your money. May need to contact them to figure out what you have.
OP we need specifics on your motor.
What compression, which cam, head casting # etc.
With a carbed 371hp it should feel night and day over your crossfire.
Somethings amiss somewhere but need more info before spending your money. May need to contact them to figure out what you have.
http://www.competitionproducts.com/T...products/1602/