Which cam setup looks good?

[bmob01]

Alright, I'm working on turbocharging my NT, and was wondering what cam people think would be best. Working for around 400-450hp yet retain the daily drive ability. I assume the .410 lift would be good. Any thoughts or experience? Here are the specs:

Description Advertised Duration
Intake/Exhaust Duration @ .050"

Lobe Lift
Gross Lift
1.75/1.75
STAGE 1
Works with stock valve sprints and retainers. Daily driver, mild idle. RPM Range: Idle to 6700+ 234/234 184/184 .200"/.200" .350"/.350"
STAGE 2
Aggressive street use and nitrous. Slight lope at idle. Springs req.
RPM Range: 1500 to 7000+ 241/241 196/196 .230"/.230" .403"/.403"
STAGE 2 - Forced Induction Special
Designed specifically for Turbo/Supercharger appl. Springs required.
RPM Range: 1500 to 7000+ 238/238 188/188 .230"/.220" .403"/.385"

STAGE 3 - 3⁄4 Race
Most popular profile for the street/strip. Springs/retainers mandatory. RPM Range: 2000-7500+
248/248 200/200 .234"/.234" .410"/.410"
STAGE 4 - Full Race
Recommended for drag race use. Springs, ECU mods required.
RPM Range: 2200 to 7500+ 254/254 216/216 .265"/.265" .463"/.463"

these cams are for a 95-99 dodge neon, I know the blocks are the same but will these fit into my head? its dohc and not sohc but does anyone know?

 

[cra]

first things is first:
can you clarify if you intend on adding a turbo system to the N/T motor? or, are you doing a 4g63t conversion, including the ancillary parts like turbo car ecu and harness changes? if it is the former, let me just say that putting a turbo system on a N/T is not for the faint of heart. you have to know what you are doing. i've seen a few go down this route only to wish that they swapped to a turbo motor/ecu/harness from the very beginning. better yet, just buy a FWD or AWD turbo DSM.

if you are still fixed on adding a turbo system to your N/T motor, then:
1) what is the stock compression ratio of a NT motor?
2) have you done a dry compression (not related to the question above) test to determine the current integrity of your motor? it is even more important to do a [wet] leakdown test to confirm the compression test results.

hold off on your cam question until you have added the turbo system. have reasonable expectations. you need to get this set up dialed in slowly, incrementally increasing the boost, before you want to mess with more aggressive cams at higher boost levels. gunning right away for 400-450 HP with daily drivability (I interpret this to mean "responsive and reliable") is a tall order. this is a common yet ellusive goal for many. i and an army of gvr4 and dsm guys have been doing this for years... it is not easy (nor cheap). even guys with stroker motors are often challenged to realiably and consistenly produce this much power on a daily driven car. and if your goal is to achieve this on pump gas, then may the force be with you.

 

[bmob01]

Alright, I was planning on swapping the block out for a srt-4 block and mating the 420a head. As for the harness and ecu I'm retaining the stock ecu but I am currently running MegaSquirt v3. I was not going to add the turbo to the system until the last step (i wanted internals and tranny to be picture perfect first). as for gas I have a pump station near my house that sells 112 octane leaded race fuel. Should I turbo my set-up before upgrading internals? I think thats backwards as seeing 22-25 lbs of boost will turn my engine to swiss cheese

 

[saturnshadow]

Have you checked the NT forms out?
i believe the srt4 block is a different bolt pattern, and you run a sebring 2.4 block and swap the srt4 internals into it.
http://forums.2gnt.com/dcboard.php

 

[dsm-onster]

Considering you want to increase your stroke with the larger 2.4 srt4 motor, you will be happy with whatever you would chose with a 2.0L turbo motor plus the next step in duration (cam size). . .

 

[dsmdeliveryboy]

Why are you gonna waste money trying to build a N/T? Pointless.. And your gonna have a VERY hard time trying to get a 420a to make that much power and still try to DD it.

 

[saturnshadow]

He said in a different thread, he did work to this car and wants to keep it.
If he does the srt4 parts swap 400whp daily is very doable.
but it is going to be allot of work/money and tuning.

 

[dsm-onster]

Why are you gonna waste money trying to build a N/T? Pointless.. And your gonna have a VERY hard time trying to get a 420a to make that much power and still try to DD it.

srt-4 motors are in all aspects better and more complete than the 4g63

 

[saturnshadow]

i have worked on a few srt4's and the only downfall they have is the turbo/manifold.
And mopar sold stage 1-3 kits with remapped ecus.
If all my friends didn't have them i would have bought one.

 

[bmob01]

yeah the sebring block with the srt-4 internals is what im shooting for (or whatever cloud car has the 2.4 and that bolts up right). The 420a head mates right to the cloud car block I believe so thats why im looking into cams for the 420a. I really don't mind spending money, im shooting for fast+reliable (which isn't cheap). the srt-4 internals and sebring block won't be much, the majority of costs will come from the ss valves, cams, cam gears, standalone, tranny and turbo.