Dynoed SVO Blower, SVO Heads, PI Cams 98 GT, weighed it too, weak sauce

[NXcoupe]

My shop is located in Dayton OH. I am not arguing that power is not to be gained with blower cams. My argument is that there is something else wrong with this combo the guy has currently. He should be close to 350 IMHO. Of course putting cams in a car is going to increase power, but to say that's the reason this isn't making good power doesn't make sense to me. You put blower cams in this combo and you get 40 more hp, well then it is still down 50 hp from where cars that were making 350 with stockers are at after picking up 40 hp with blower cams, which would give them 390. That's what I am saying, nothing else. Hope this clears it up.

 

[blown98gt]

i think the problem is the power adder

 

[NXcoupe]

You know that very well could be. But I really doubt it. Something just isn't right. I can't remember, did you verfiy cam timing was correct? I had a guy do his own PI swap and it was down about 35 hp from all the other cars we had dyno'd with similar mods and the swap. We also data logged the car on a bunch of pulls and noticed one side's long term fuel trims were off the chart. So either his brand new O2 was bad, or there was something else going on. So we swapped O2's and the problem stayed on the same side. PUlled it apart and the cam timing was out a bunch. Put it back on the dyno and power was where it should have been. Just a thought.

 

[97stanger]

thats an idea. possible the timing could be off

 

[DropTopPony]

With his car i think its a combo of things.
First is he's running the stock pulley @5psi
Second is i'm not sure the tune is good.
Third is with the power its putting down the heads might not be the SVO its supposed to have on it but stock NPI.

Cams could definitely need to be timed.

 

[chaz]

I say Meth, tune and a better pully, 5 PSI is very low 11 PSI with meth cooling that blower off would add some major HP

 

[97stanger]

thats very true. tons of factors. i say its a combo of everything that people have listed so far.....you got the mods for some nice power, just gotta piece it all together

 

[lordgufi]

biggest thing i noted... was did he have the car tuned after the 30 lb injectors went in? if not the ecu is adjusting for whatever the stock size was and opening for that duration for that amount of air. so essentially if he had 19 lb injectors and went to 30 he's tossing 30% more fuel into every cylinder.... Just a thought

no tune + changing injectors = lucky the car is even running

 

[blown98gt]

dude trust me, its the cams. I have spent the last year going through different cam setups and talking to atleast 6 speed shops. stock PI cams are good for N/A motors of just bolt on cars. But when you throw a blower on you need a cam with more duration. PI cams have less duration than NON PI cams, so you are actually going backwards. Trust me, this is coming from someone who has personally done all of this. You need blower cams. Also, make sure you degree them. thats another problem I once had

Well, I own a speed shop and have a loading dyno. I don't want to argue with you. Your experiences are different from mine and when I work with customers I am not trying to sell them anything they don't need. We made 370 rwhp on a stock 03 GT with stock cams, intake, larger throttle body and plenum and a full exhaust with a Procharger only pushing 10 psi of boost or so. I do have a lot of experience with this, and I agree cams would add to the hp and just fun of it, but it is not his problem. I run 9's with a stock cam in a 5.0, but everyone in our class running a 5.0 does that, so it's nothing to brag about.

you are talking about a procharger the SVO blower is one of the lower end blowers and honestly i think that is the problem in itself. but i agree the problem is in the 5lb boost pulley or whatever the stock pulley is. you are going to see a huge gain most people see gains from 10lbs and up obviously more boost doesn't always mean more gain since boost is a measure of resistance, you could see a lot more at 10lbs boost.. i never would've got with the SVO blower in the first place but up the boost, and see if it gets better if not.. honestly i'd change the power adder

 

[NERD]

Change that stupid blower.

 

[Speeds8erM-1]

WTF, I never even knew there were all of these replys until now, weird lol.

Anyway, I bought the car like this, and one thing that has been bothering me is the previous owner said air fuel was closer to 12.0, where the hell did it go? It's 10.0's pegged now. It was tuned 7 years ago, but still. I think the belt may be slipping a bit, I didnt notice any obvious belt dust until I pulled the blower awhile back, the bottom of the snout had a bit of dust, and this belt is YEARS old. It doesnt have alot of miles, but it's old in age.

I had the blower sold, so was just piecing my n/a parts together, until I just found out the buyer for the blower, backed out.....but while I was still trying to find n/a parts, I had decided to get a new belt for it one night. I couldnt find the Gatorback at Autozone without ordering it, same for the Dayco at Advance, O Reilly's had a Gates instock but wanted $67 for the sob. I said fugg it, but did get them to bring it out so I could see if mine was stretched, both 113" belts, and mine was a bit longer. I had the same thing happen on a Powerdyne fox body years ago, and a new belt woke it right back up. Fugg paying $67 for a belt though.

Now I have found a Dayco Polycog at Advance for a good price, but when I went to the closer Advance, instead of the one I called, they didnt have it. I have been in the middle of moving, and all kinds of stuff, so I havent really done much with the car. I may sell it, I want a fox body again.

The temperature did get into the 50's last week, and the car felt like it picked up a solid 50 rwhp over the day weather we have been having. I may put a belt on it this weekend, and see if it wakes back up. The car felt alot stronger than 292 rwhp when I bought it, and that was with a way crappier exhaust setup. Maybe the belt has been going down hill?

I know the iat's are probably pretty high, the sensor is still located before the blower, and was 115 degrees on a hot day, I would hate to see the iat's AFTER the blower. Im just gonna sell the blower, and go n/a with a 150 shot or something for now (unless I buy a shortblock I happened to have found, then it may be alot more nitrous, or a Vortech and nitrous)

 

[Speeds8erM-1]

biggest thing i noted... was did he have the car tuned after the 30 lb injectors went in? if not the ecu is adjusting for whatever the stock size was and opening for that duration for that amount of air. so essentially if he had 19 lb injectors and went to 30 he's tossing 30% more fuel into every cylinder.... Just a thought

no tune + changing injectors = lucky the car is even running

I dont think it would have ran for 7 years like that, not to mention I clearly stated the car was tuned with Autologic several years ago.

 

[Speeds8erM-1]

With his car i think its a combo of things.
First is he's running the stock pulley @5psi
Second is i'm not sure the tune is good.
Third is with the power its putting down the heads might not be the SVO its supposed to have on it but stock NPI.

Cams could definitely need to be timed.

Blower has been off, it definitely has SVO Heads. Cams werent degreed when installed, so who knows.

 

[Speeds8erM-1]

Also, for comparion with similar blowers.

My friend got his 04 Mach 1 tuned on the same dyno I dynoed on, with an 03 Cobra Eaton swap, stock pulley, makes around 8-9 psi or so, intercooled, completely stock exhaust, and stock everything really, 90mm maf, it made 410 rwhp and 382 rwtq, he had some issues with a vac leak. They put it on the dyno to check something, retuned it on a different day and it made 404 rwhp and like 9 rwtq more than it did before.

I watched a Tork Tech car get tuned at RWTD earlier this week, was a Magnuson modified Eaton setup from an 03 Cobra, intercooled, long tubes, exhaust, it made like 370 something rwhp on 7 or 8 psi. Was 382 STD on it's last pass, and I know the SAE pass before that was around 8 lower than the SAE.

 

[blown98gt]

Also, for comparion with similar blowers.

My friend got his 04 Mach 1 tuned on the same dyno I dynoed on, with an 03 Cobra Eaton swap, stock pulley, makes around 8-9 psi or so, intercooled, completely stock exhaust, and stock everything really, 90mm maf, it made 410 rwhp and 382 rwtq, he had some issues with a vac leak. They put it on the dyno to check something, retuned it on a different day and it made 404 rwhp and like 9 rwtq more than it did before.

I watched a Tork Tech car get tuned at RWTD earlier this week, was a Magnuson modified Eaton setup from an 03 Cobra, intercooled, long tubes, exhaust, it made like 370 something rwhp on 7 or 8 psi. Was 382 STD on it's last pass, and I know the SAE pass before that was around 8 lower than the SAE.

first off, a 4v is nothing like a 2v so you can't not even begin to compare an Eaton swap on a mach 1 and a Pi swapped GT.. doesn't work that way. 4v's always make more power and there is no way you can compare them they are two different motors. Also the tork tech blower is not an Eaton M112 it's a modified Tork tech blower, i'm telling you a few things.. the svo/roush blower is not a amazing blower... obviously there is more to account a steggy port job on the blower and a much smaller s/c pulley could obviously get you more into the power range i think you are looking for but i still think best thing to do is drop it and get a different poweradder...

 

[Speeds8erM-1]

Thanks for pointing out the VERY OBVIOUS, I was posting to show a comparison of where other cars are getting with the Eaton. Basically if they are only getting there with the Eaton, I probably dont have a chance of getting where I want to be easily.

 

[blown98gt]

which brings me back to my original post where i said toss the eaton lol

 

[vermilion]

make the svo blower a door stop.

 

[Speeds8erM-1]

I already have a PI Intake, Accufab 75mm Plenum & TB, JLT RAI, and stock injectors for the car, oh and an NX Kit I have had for awhile, so Im gonna change something soon. It's just tempting to push the blower setup, since it's such a sleeper setup, it's the most hidden blower setup ever. Some methanol, pulley swap, 90mm LMAF, and a retune would wake it up a bit, but my guess it still comes up way short on power for me.

Im gonna put a new blower belt on it, and see if it picks up some power, then Im gonna try to call out my buddy in his 97 Cobra that made 286 rwhp, and see what happens, he raped me when he had the Procharger on it, making 406 rwhp, but I expected that. We are close in power, comparing our dyno numbers, but it's been getting cooler, and the Eaton likes that.

 

[blown98gt]

without a built block you really are not going to get that far so i wouldn't worry about it too much plus to run a nitrous setup that would get you into the higher 300 hp range would require some fuel mods and a tune for nitrous and that is only temporary power.. the money you spend in refilling bottles (it's addicting) you could've saved for a real blower. Vortech kits can be had for under 2k now-a-days