Winter Project: Intake Replacement....what else while we're down there?
Thread Starter
Drifting
Joined: Jun 2002
Posts: 1,406
Likes: 0
From: York PA
Winter Project: Intake Replacement....what else while we're down there?
This winter will see the replacement of my stock intake, plenum and runners with TPiS Big Mouth intake, Siamese Runners and a Ported Plenum. Obviously alot off the top of the engine will be removed to do this. Also, I know this will be labor intensive; especially since I'm paying someone else to do it. However, is there anything else I could do that's not terribly expensive while the intake system is off?
Melting Slicks
Joined: Aug 2000
Posts: 2,388
Likes: 42
From: Murrysville PA
Re: Winter Project: Intake Replacement....what else while we're down there? (fast90)
Not really. The only other thing is the roller lifters but at 59K they should be just fine. Why did you choose the siameese runners? I like the ASM runners myself. I used to have a set. They looked stock and fit very well.
You should really consider a cam swap while your that far in it. It would really bring that whole system together. With the intake system you are thinking of and mild Crane cam, I made 270 hp to the wheels which is about 320 flywheel. Car really ran nice but at 4800 it was all done.
Here is a picture from 1999 when I had that set up.
Jason
You should really consider a cam swap while your that far in it. It would really bring that whole system together. With the intake system you are thinking of and mild Crane cam, I made 270 hp to the wheels which is about 320 flywheel. Car really ran nice but at 4800 it was all done.
Here is a picture from 1999 when I had that set up.
Jason
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Winter Project: Intake Replacement....what else while we're down there? (fast90)
Being in that far the valve covers would be rather easy to remove, time wise.
If you aren't going to do a cam soon you might install a set of 1.6:1 ProMagnums, new valve springs and lower seals.
Oh, have your mechanic splice an entension into the Grn wire comming behind the oil pressure sw to bring the EGR Temp Sw connector up to the right of the dist. Later if you have EGR problems and need to change that sw the connector will be accessable.
If you aren't going to do a cam soon you might install a set of 1.6:1 ProMagnums, new valve springs and lower seals.
Oh, have your mechanic splice an entension into the Grn wire comming behind the oil pressure sw to bring the EGR Temp Sw connector up to the right of the dist. Later if you have EGR problems and need to change that sw the connector will be accessable.
Thread Starter
Drifting
Joined: Jun 2002
Posts: 1,406
Likes: 0
From: York PA
Re: Winter Project: Intake Replacement....what else while we're down there? (89vette)
Not really. The only other thing is the roller lifters but at 59K they should be just fine. Why did you choose the siameese runners? I like the ASM runners myself. I used to have a set. They looked stock and fit very well.
You should really consider a cam swap while your that far in it. It would really bring that whole system together. With the intake system you are thinking of and mild Crane cam, I made 270 hp to the wheels which is about 320 flywheel. Car really ran nice but at 4800 it was all done.
Here is a picture from 1999 when I had that set up.
Jason
You should really consider a cam swap while your that far in it. It would really bring that whole system together. With the intake system you are thinking of and mild Crane cam, I made 270 hp to the wheels which is about 320 flywheel. Car really ran nice but at 4800 it was all done.
Here is a picture from 1999 when I had that set up.
Jason
I'm thinking hard about swapping the cam, but being such a newbie, I don't know what replacement parts I need, where I can get them and for how much. If you (or anybody for that matter) can give me ideas, I'd greatly appreciate it.
P.S. Don't tell my wife :reddevil
Melting Slicks
Joined: Aug 2000
Posts: 2,388
Likes: 42
From: Murrysville PA
Re: Winter Project: Intake Replacement....what else while we're down there? (fast90)
The cam I used was a Crane cam part number 104-224. The lift was .452/.465 with 1.5 rockers and the duration was 214/220 on a 112 deg LSA. I liked the cam alot. Had a slight lope at idle and had not driveability concerns. A cam swap can be expensive if you have someone do it. I believe that on a 90, you have to remove the AC condenser. If you have R12 in your system, its very expensive to put back in. You would probably be better off converting to R134a. Your best bet may be to install a set of Crane narrow body roller rockers with a 1.6:1 ratio. Another tip I can give you is buy a can of valve cover paint from Mid America. Repaint your valve covers, ASM runners and plenum. It will make your motor look wonderful and stock. I'd also stick with the stock throttle body for now. I'm not sold on the bigger TB deal. So for a recap, I suggest.
Intake as you are doing.
1.6 roller rockers
Repaint covers, runners and plenum.
If you have some extra cash, put a set of good headers on.
Jason
Intake as you are doing.
1.6 roller rockers
Repaint covers, runners and plenum.
If you have some extra cash, put a set of good headers on.
Jason
Thread Starter
Drifting
Joined: Jun 2002
Posts: 1,406
Likes: 0
From: York PA
Re: Winter Project: Intake Replacement....what else while we're down there? (89vette)
Gotcha! It now makes a little more sense what 65Z01 said above. I think I'll pass on the cam swap afterall. I don't race the car anyways. Is there a lot of labor hours involved in putting new rockers in place of the old ones with new seals and springs? Also, would the new rockers and intake give me a noticeable power increase?
Headers are a huge consideration next spring :)
Headers are a huge consideration next spring :)
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Melting Slicks
Joined: Aug 2000
Posts: 2,388
Likes: 42
From: Murrysville PA
Re: Winter Project: Intake Replacement....what else while we're down there? (fast90)
The Crane Narrow Body self aligning roller rockers are much like those GM used on the LT4's. You will not have to change the springs. You will have to grind the oil drippers a little on the inside to clear the rockers. You should pick up a nice chunk of power with your mods. I did make a mistake before though. The dyno at 270 RWHP was with CNC ported L98 heads and headers also.
Jason
Jason
Thread Starter
Drifting
Joined: Jun 2002
Posts: 1,406
Likes: 0
From: York PA
Re: Winter Project: Intake Replacement....what else while we're down there? (89vette)
The Crane Narrow Body self aligning roller rockers are much like those GM used on the LT4's. You will not have to change the springs. You will have to grind the oil drippers a little on the inside to clear the rockers. You should pick up a nice chunk of power with your mods. I did make a mistake before though. The dyno at 270 RWHP was with CNC ported L98 heads and headers also.
Jason
Jason
Also, take a look at my current mods. Figure in that I'm getting the new intake setup and roller rockers. Next summer might get headers. Will the stage II chip that I bought from Fastchip be sufficient or will I need to get a custom chip. Or would you suggest having it dyno-tuned once all these future mods are installed?
So, the rockers are all I will need to replace? Need not worry about new seals and springs? What about pushrods and guide plates? Ugh...so confusing. It's issues like these that make me wish I hung around a car garage when I was growing up :D
I will be patient. I just want to get all my ducks in a row before I take the car in for service this winter. I won't even have my new intake components until sometime next month anyways.
Thanks for your help!
[Modified by fast90, 4:30 PM 9/25/2002]
Instructor
Joined: Apr 2002
Posts: 243
Likes: 0
From: Hockessin DE
Re: Winter Project: Intake Replacement....what else while we're down there? (fast90)
hey Fast90, you have the EXACT same mods as me, minus the upgraded PROM. ever been to the track with that combo? if so, what are you running? i just wanted to compare times with similarly modded cars. i havent been able to tune the combo i have yet, but i should have it down in a few weeks. just want to know what to expect
Thread Starter
Drifting
Joined: Jun 2002
Posts: 1,406
Likes: 0
From: York PA
Re: Winter Project: Intake Replacement....what else while we're down there? (tpivette89)
hey Fast90, you have the EXACT same mods as me, minus the upgraded PROM. ever been to the track with that combo? if so, what are you running? i just wanted to compare times with similarly modded cars. i havent been able to tune the combo i have yet, but i should have it down in a few weeks. just want to know what to expect
I'd be interested to hear how you made out. I suppose that sometime next summer, I'd like to head to a track and see how I make out.
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Re: Winter Project: Intake Replacement....what else while we're down there? (KYVette90)
fast90, are you expecting an large increase in HP with the parts you will be bolting on being just the intake, runners and plenum?
Thread Starter
Drifting
Joined: Jun 2002
Posts: 1,406
Likes: 0
From: York PA
Re: Winter Project: Intake Replacement....what else while we're down there? (ld85)
fast90, are you expecting an large increase in HP with the parts you will be bolting on being just the intake, runners and plenum?
Safety Car
Joined: Oct 2001
Posts: 4,763
Likes: 1
From: Connectivette
Re: Winter Project: Intake Replacement....what else while we're down there? (fast90)
One thing I changed while I had my intake off was an AFPR. This is is made by Holley. If your not planning on heading to the track you may want to forgo this
I painted my valve covers with POR15 high-temp engine paint. It is brushed on and "wets-out" nicely. Here are before/after and present pics of my valve covers.
I painted my valve covers with POR15 high-temp engine paint. It is brushed on and "wets-out" nicely. Here are before/after and present pics of my valve covers.
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Re: Winter Project: Intake Replacement....what else while we're down there? (ld85)
Hey Chuck, where do you get the perssure guage that allows you to see the pressure on a dial?
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Re: Winter Project: Intake Replacement....what else while we're down there? (scorp508)
The gage I am talking about stays on the motor not one that you connect and disconect for setup and adjustment! Looks way cool! :cool: